1918:
Graebner, Paul
"Taschenbuch zum Pflanzenbestimmen" (1918) Stuttgart, Franckh'sche Verlagshandlung
Number of scanned pages: 224
(Botanik; Systematik)
Language: German, Created: 2006-07-24
Contains 392 black and white drawings.
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pdf-File: Complete book (Medium resolution) (69.93 MBytes)

Haecker, Valentin
"Entwicklungsgeschichtliche Eigenschaftsanalyse" (1918) Jena, Verlag von Gustav Fischer
Number of scanned pages: 360
(Genetik; Evolution)
Language: German, Created: 2005-06-06
Early studies about the mendelian rules of inheritance.
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pdf-File: Complete book (Medium resolution). (95.49 MBytes)

Hertwig, Oscar
"Das Werden der Organismen" (1918)
Number of scanned pages: 710
(Evolution)
Language: German, Created: 2003-03-24
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pdf-File: Complete book (Medium resolution). (198.05 MBytes)