Kakteenlexikon

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Kakteenlexikon

https://web.archive.org/web/20070129132817/http://www.ceropegia.minks-lang.de/ceropegia.arten.n-z/c.rhynchantha.html

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Kakteenlexikon

http://wayback.archive.org/web/20070120122517/http://www.ceropegia.minks-lang.de/ceropegia.arten.n-z/c.tomentosa.html

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Kakteenlexikon

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Kakteenlexikon

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Kakteenlexikon

http://wayback.archive.org/web/20070120122746/http://www.ceropegia.minks-lang.de/ceropegia.arten.a-m/c.manderensis.html

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https://portal.dnb.de/opac.htm?method=simpleSearch&query=102010455

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Kakteen Haage | Walther Haage (1899 - 1992) | online kaufen

http://gaertnerei.kakteen-haage.de/geschichte/walther-haage/

Walther Haage (1899 - 1992)

Illustrated Handbook of Succulent Plants: Dicotyledons - Focke Albers - Google Books

http://books.google.de/books?id=ffBRAyZLuh0C&pg=PA104&dq=%2B%22Illustrated+Handbook+of+Succulent+Plants%22+%2BEuphorbia&sig=orW0

The history of the project that eventually led to the publication of the present handbook series was outlined in the preface to the Monocotyledons volume, published in the summer of 2001. A short summary of its history will therefore be sufficient:…