- Publication venue
- Bonn :Das Forschungsinstitut
- Publication date
- 01/01/1968
- Field of study
Volume: 19Start Page: 307End Page: 32
- Publication venue
- London :British Ornithologists\u27 Club,1893-
- Publication date
- 01/01/1965
- Field of study
Volume: 85Start Page: 111End Page: 11
- Publication venue
- Bonn :Das Forschungsinstitut
- Publication date
- 01/01/1961
- Field of study
Volume: 12Start Page: 40End Page: 5
- Publication venue
- Bonn :Das Forschungsinstitut
- Publication date
- 01/01/1971
- Field of study
Volume: 22Start Page: 252End Page: 25
- Publication venue
- 'Springer Science and Business Media LLC'
- Publication date
- Field of study
- Publication venue
- 'Springer Science and Business Media LLC'
- Publication date
- Field of study
- Publication venue
- 'Springer Science and Business Media LLC'
- Publication date
- 01/01/1946
- Field of study
- Publication venue
- 'Springer Science and Business Media LLC'
- Publication date
- Field of study
- Publication venue
- Publication date
- 01/01/1958
- Field of study
- Publication venue
- 'Springer Science and Business Media LLC'
- Publication date
- Field of study