Contamination Crew By: Alan Edward Nourse

The New Heavens By: George Ellery Hale

Regeneration By: Katherine MacLean

Out Around Rigel By: Robert H. Wilson

The Task of Social Hygiene By: Havelock Ellis

Friendly Visiting among the Poor A Handbook for Charity Workers By: Mary Ellen Richmond

Hail to the Chief By: Randall Garrett

Star Mother By: Robert F. Young

Medal of Honor By: Mack Reynolds

Benefactor By: George H. Smith

The Fabric of Civilization A Short Survey of the Cotton Industry in the United States By: Guaranty Trust Company of New York

Occasion for Disaster By: Randall Garrett

Tarrano the Conqueror By: Ray Cummings

My Friend Bobby By: Alan Edward Nourse

Solomon's Orbit By: William Carroll

...Or Your Money Back By: Randall Garrett

Birds of the Indian Hills By: Douglas Dewar

The Green Beret By: Thomas Edward Purdom

Blind Man's Lantern By: Allen Kim Lang

Sorry: Wrong Dimension By: Ross Rocklynne

Disqualified By: Charles Louis Fontenay

Essays on Life, Art and Science By: Samuel Butler

The Wonders of Instinct Chapters in the Psychology of Insects By: Jean-Henri Fabre

Ohio Biological Survey, Bull. 10, Vol. 11, No. 6 The Ascomycetes of Ohio IV and V By: Bruce Fink

Biology A lecture delivered at Columbia University in the series on Science, Philosophy and Art November 20, 1907 By: Edmund B. (Edmund Beecher) Wilson

Country Walks of a Naturalist with His Children By: W. (William) Houghton

Unborn Tomorrow By: Mack Reynolds

Control Group By: Roger D. Aycock

What The Left Hand Was Doing By: Randall Garrett

Next Door, Next World By: Robert Donald Locke

Zoonomia, Vol. II Or, the Laws of Organic Life By: Erasmus Darwin

The Life of the Bee By: Maurice Maeterlinck

The Young Mother Management of Children in Regard to Health By: William A. Alcott

The Worlds of If By: Stanley Grauman Weinbaum

The Beast of Space By: F. E. Hardart

The Professional Approach By: Theodore Lockhard Thomas

Faithfully Yours By: Lou Tabakow

A Study of Recent Earthquakes By: Charles Davison

The Home Medical Library, Volume I (of VI) By: Kenelm Winslow

Taxidermy By: Leon Luther Pray

Laboratory Manual of Glass-Blowing By: Francis C. (Francis Cowles) Frary

Secrets of the Woods By: William Joseph Long

Studies in Forensic Psychiatry By: Bernard Glueck

Bird Day; How to prepare for it By: Charles Almanzo Babcock

Blessed Are the Meek By: G. C. Edmondson

Omega, the Man By: Lowell Howard Morrow

Collector's Item By: Robert F. Young

Irresistible Weapon By: Horace Brown Fyfe

The Great War Syndicate By: Frank Richard Stockton

The Railroad Builders; a chronicle of the welding of the states By: John Moody

Response in the Living and Non-Living By: Jagadis Chandra Bose

Traders Risk By: Roger D. Aycock

Untechnological Employment By: Ed M. Clinton

Subversive By: Mack Reynolds

The Indulgence of Negu Mah By: Robert Arthur

In Mesopotamia By: Maurice Nicoll

The Perfectionists By: Arnold Castle

Impact By: Irving E. Cox

The Coming of the Ice By: Green Peyton

Stopover Planet By: Robert E. Gilbert

Was Man Created? By: Henry A. (Henry Augustus) Mott

Women of Modern France By: Hugo P. (Hugo Paul) Thieme

Rip Foster in Ride the Gray Planet By: Harold L. Goodwin

On the Genesis of Species By: St. George Jackson Mivart

Chatterbox Stories of Natural History By: Anonymous

The Servant Problem By: Robert F. Young

Pushbutton War By: Joseph Paul Martino

By Proxy By: Randall Garrett

The Death-Traps of FX-31 By: Sewell Peaslee Wright

Teething Ring By: James Causey

Lonesome Hearts By: Russell R. Winterbotham

Birds and Bees, Sharp Eyes, and Other Papers By: John Burroughs

Six Lectures on Light Delivered In The United States In 1872-1873 By: John Tyndall

The Social Emergency Studies in Sex Hygiene and Morals By: William Trufant Foster

Moral Principles and Medical Practice The Basis of Medical Jurisprudence By: Charles Coppens

The Human Side of Animals By: Royal Dixon

Suite Mentale By: Randall Garrett

The Measure of a Man By: Randall Garrett

Darwin, and After Darwin An Exposition of the Darwinian By: George John Romanes

Hard Guy By: H. B. Carleton

Adenoids: What They Are, How To Recognize Them, What To Do For Them By: United States. Public Health Service

Resurrection By: Robert Shea

There Will Be School Tomorrow By: V. E. Thiessen

A Treatise on Physiology and Hygiene For Educational Institutions and General Readers By: Joseph Chrisman Hutchison

United States Census Figures Back to 1630 By: United States. Bureau of the Census

Edison's Conquest of Mars By: Garrett Putman Serviss

Sir Jagadis Chunder Bose His Life and Speeches By: Jagadis Chandra Bose

Stairway to the Stars By: Larry T. Shaw

Dead Giveaway By: Randall Garrett

Egocentric Orbit By: John Cory

The Jameson Satellite By: Neil Ronald Jones

Hanging by a Thread By: Randall Garrett

Oneness By: James H. Schmitz

Coral Reefs By: Charles Darwin

The Dark Door By: Alan Edward Nourse

In Case of Fire By: Randall Garrett

The Unnecessary Man By: Randall Garrett

The Delegate from Venus By: Henry Slesar

The Weakling By: Everett B. Cole

Foundling on Venus By: John De Courcy