Ornithology

MAIR, CHARLES.

Toronto, William Briggs, 1908.

DANSK FUGLEHOLD.

Skibby, 1975-92.

REICHENOW, ANTON.

Stuttgart, Ferdinand Enke, 1913-14.

TURNER, L.M.

Washington, Government Printing Office, 1886.

COLLETT, ROBERT.

Christiania, 1881.

STRESEMANN, ERWIN.

Heidelberg, 1949.

GRANVIK, HUGO.

Bernburg, 1923.

PETERSEN, ALWIN.

Kbhvn., 1926-42.

LANGE, HALFDAN.

LØPPENTHIN, BERNT.

TINBERGEN, NIKOLAAS.

Stockholm, P. A. Norstedt & Söner, 1974.

NAUMANN, J.A.

Gera-Untermhaus, (1899).

ROM'S FUGLE-ALBUM.

Kbhvn., u. år (ca. 1890).

BENSON, S. VERE.

London, N.Y., (1970).

NAUMANN, J.A.

Gera-Untermhaus, (1902).

NAUMANN, J.A. - ENTEN.

Gera-Untermhaus, (1902).

MACKWORTH-PRAED, C.W. and GRANT, C.H.B.

London, Longmans, Green and Co., 1957-60.

WILLIAMS, ARTHUR B. (Edt.).

Cleveland, (1950).