Kurt Stuber's Historical Biology Library
"This is a collection of historic and modern biology books. Many of these books are currently out of print and hard to obtain from public libraries or book sellers. They have either been typed or entered via optical character recognition software (OCR). The earliest edition is from 1543, and copies of historic texts are identified into 1 of 42 categories."
"All of these books are published here for common benefit, to help students of biology and teachers in learning and research." [from webiste]
English and German (Deutsche) versions.
Northern Europe, International