as a dentist in Ödeshög, in Skara, and at the sanatorium Stora Ekeberg in Axvall ; Makatsch, Wolfgang (1906-1983): Die Vögel in Haus, Hof und Garten (Radebeul: Neumann-Verlag, 1956, 5th edition: 1968) & Die Vögel in Wald und Heide (Radebeul: Neumann, 1959; 2nd edition: 1962, 3rd edition: 1965) & Die Vögel in Feld und Flur (Radebeul: Neumann, 1953; 2nd edition: 1955, 3rd edition: 1960, 4th edition: 1963) & Die Vögel der Seen und Teiche (Radebeul: Neumann, 1952; 2nd edition: 1953; 3rd edition: 1954; 4th edition: 1955; 5th edition: 1958; 6th edition: 1964; 7th edition: 1973) ;
Bylin, Kjell & Sture Traneving (*1936) ;
ornithological photography
https://sv.wikipedia.org/wiki/Per_Olof_Swanberg ;
199504973
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