Proceedings of the VIIth International Orthnithological Congress at Amsterdam 1930
By: under direction of the President published by L.F. de Beaufort
Contributors: Beaufort, L. F. de; Beaufort, L. F. de (Lieven Ferdinand de), 1879-1968
Publisher: C. de Boer Jr.
Published: 1931
Place of publication: Den Helder (Neth.)
Language: eng; fre; ger
Number of pages: 527
Subjects: Ornithology; Congresses; Birds
Notes: Text in English, French and German.

Include bibliographies.