Ornithologische Beobachtungen in der Muss-Alla-Gruppe (Rila-Gebirge) 1916–19
- 1 July 1919
- journal article
- Published by Springer Nature in Journal of Ornithology
- Vol. 67 (3) , 233-257
- https://doi.org/10.1007/bf02537902
Abstract
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