Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Alton D. Adams
Various
United States. Army. Corps of Engineers. Manhattan District
Augustus Henry Lane-Fox Pitt-Rivers
Paul Severing
Anonymous
Joseph Roberts
Elisha Noyce
Philip Gengembre Hubert
Marquis of Edward Somerset Worcester
Jet Propulsion Laboratory
Ray Stannard Baker
H. de Graffigny
John H. White
Richard Threlfall
William A. Mowry and Arthur May Mowry
United States. Congress. House. Committee on Science and Astronautics.
Thomas Henry Huxley
Charles B. Hayward
These books are free to read. Each is in the public domain in the United States; check your own country's rules before you copy or share one.