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====== Backeberg ======
Thanks to **Matthias Echtermeyer** (Backeberg heir) and **Gottfried Gutte** (our contact with Matthias Echtermeyer) for authorizing these electronic versions of the documents.


===== 10 Jahre Kakteenforschung, 1927-1937. =====
{{:copyrightr.png?20 |}} Under copyright (with permission)

{{ :10jahre_1_10.jpg|:10jahre_1_10.jpg}}
Often cited by Backeberg in Die Cactaceae. Rare catalogue of 44 pages containing plant lists, pictures (B&W), short descriptions, advertisement…
  * Image file: [[http://cactusbiblio.free.fr/Backeberg/Backeberg_10JahreKak.pdf|Backeberg_10JahreKak.pdf]] (6,3MB; 2006-08-10)
  * Original file: [[http://cactusbiblio.free.fr/Backeberg/Backeberg_10JahreKak_O.pdf|Backeberg_10JahreKak_O.pdf]] (12,2MB; 2006-08-10)
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===== Bildkatalog =====
{{:copyrightr.png?20 |}} Under copyright (with permission)

{{ :bildkat_1_10.jpg|:bildkat_1_10.jpg}}
A selection of many pictures, often used later in his publications.
  * Image file: [[http://cactusbiblio.free.fr/Backeberg/Backeberg_BildKatalog.pdf|Backeberg_BildKatalog.pdf]] (6,7MB; 2006-08-10)
  * Original file: [[http://cactusbiblio.free.fr/Backeberg/Backeberg_BildKatalog_O.pdf|Backeberg_BildKatalog_O.pdf]] (7,4MB; 2006-08-10)
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===== Südamerika Expedition 1935/36 =====
{{:copyrightr.png?20 |}} Under copyright (with permission)

{{ :sudam_1_10.jpg|:sudam_1_10.jpg}}
A small catalogue with some pictures and descriptions.
  * Image file: [[http://cactusbiblio.free.fr/Backeberg/Backeberg_SudamerExped.pdf|Backeberg_SudamerExped.pdf]] (1,6MB; 2006-08-10)
  * Original file: [[http://cactusbiblio.free.fr/Backeberg/Backeberg_SudamerExped_O.pdf|Backeberg_SudamerExped_O.pdf]] (3,9MB; 2006-08-10)
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