@book{bhlitem35491, title = {Der Ornithologische Beobachter }, volume = {5, 1906}, copyright = {NOT_IN_COPYRIGHT}, url = {https://www.biodiversitylibrary.org/item/35491}, note = {https://www.biodiversitylibrary.org/bibliography/8611}, publisher = {Bern?, Ala, Schweizerische Gesellschaft für Vogelkunde und Vogelschutz, }, author = {Ala, Schweizerische Gesellschaft für Vogelkunde und Vogelschutz.}, year = {1906}, pages = {236}, keywords = {59.82.06(49.4)|Birds|Conservation|Periodicals}, }