Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Hermann von Helmholtz
Andy Adams
Various
Sir Humphry Davy Rolleston
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521 downloads
Richard Caton
Elizabeth Blackwell
Charles Arthur Mercier
Herbert Lester Gilman
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.