Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Various
Henry W. Henshaw
Georgetown University. School of Foreign Service
Cosmos Mindeleff
535 downloads
Gustav von Bezold
J. A. Filcher, Frank Wiggins, and California. Alaska-Yukon-Pacific exposition commission
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.