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====== Alwin Berger (1871-1931) ======
He was the author of several books devoted either to succulents or to cacti.

===== Die Agaven =====
{{:copyrightv.png?20 |}} No copyright (public domain)

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Published in 1915, this is an interesting contribution with 48 B&W pictures 
  * Original file: can be downloaded from the [[http://edocs.ub.uni-frankfurt.de/volltexte/2006/50015/index.html
|Frankfurt University library]]((If you use this file, you must comply with the rules of the library)). "Dokument1" is a heavy high definition file whereas "Dokument3" is a lighter version (low definition); "Dokument2" is a sample.
  * Interpreted file: Not still available.
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Right: Agave latissima (Extracted from the pdf of the link above)
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===== A systematic revision of the genus Cereus Mill. =====
{{:copyrightv.png?20 |}} No copyright (public domain)

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Published in 1905, In the //Annual Report of the Missouri Botanical Garden//. He proposed to split the Cereus genus of Schumann as defined 5 years before into several subgenera that were then recognized (or resurected) as genera By Britton and Rose 15 years later.


  * A pdf file containing both the original and interpreted text (p. 57-86) can be downloaded as [[http://www.botanicus.org/botanicus7/b13081846/31753003450266/31753003450266.pdf
|31753003450266.pdf]] file((If you use this file, you must comply with the rules of the library)), which is hosted by the [[http://www.botanicus.org/browse
|Missouri Botanical Garden Library]]. Visit this library to find more books and to know their copyright rules (clik the "copyright" tab)
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Right: Alwin Berger. //Kakteen von A bis Z//, Walther Haage, Neumann, 1983.\\ 
===== Kakteen =====
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{{:copyrightv.png?20 |}} No copyright (public domain)\\ 
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Published in 1929, this is an exhaustive contribution (334 pages, 104 B&W pictures) of an unsufficiently known author who had a broad scientific. knowledge
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  * Image file: [[http://cactusbiblio.free.fr/Berger_Kakteen_O.pdf|Berger_Kakteen_O.pdf]] (99.3MB; 2006-12-31)
  * Interpreted file: [[http://cactusbiblio.free.fr/Berger_Kakteen.pdf|Berger_Kakteen.pdf]] (17.3MB; 2007-12-31)
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Right: Ariocarpus trigonus (p. 333)
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