Mitteilungen der Deutschen Dendrologischen Gesellschaft . Pseudotsuga Douglasii. Saat aus Nr. 5 Madison (Montana) 1910. (Phot. Mai 1912.). Pseudotsuga Douglasii. Saat aus Nr. 6 Bitterrpot (Montana) 1910. (Phot. Mai 1912.) 6o Fr. Graf von Berg: 1912.

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectforestsandforestry