Ornithology

FORSHAW, JOSEPH M.

(New Jersey, 1978).

COHEN, EDWIN.

Edinburgh, London, (1963).

ORNITHOLOGISCHE BERICHTE.

Heidelberg, 1947-50.

HANDBUCH DER VÖGEL MITTELEUROPAS.

Frankfurt a. Main, 1966-77.

BROWN, LESLIE.

London, (1959).

DIXON, CHARLES.

London, Glasgow, Blackie, 1900.

KUPFFER, C. und B. BENECKE.

Halle, 1879.

UTTENDÖRFER, O.

(Berlin), J. Neumann=Neudamm, (1939).

GOULD, JOHN.

London, Printed by Taylor and Francis - Published by the Author, (1862-) 73.

GOULD, JOHN.

London, Printed by Taylor and Francis - Published by the Author, (1862-) 73.

HOLGERSEN, HOLGER.

Oslo, 1945.

DAVIDSON, ALAN.

London, 1954.

RIVOLIER, JEAN.

London, (1956).

IVANOV, A. I., E. V. KOZLOVA, L. A. PORTENKO and A. JA. TUGARINOV.

MATVEJEV, S.D.

Moskva, 1950.

NEUNZIG, KARL.

Magdeburg, 1907.

SLUD, PAUL.

N.Y., 1964.

HEILMANN, GERHARD og A.L.V. MANNICHE.

Kbhvn., 1928-30.