Ornithology

COHEN, EDWIN.

Edinburgh, London, (1963).

ORNITHOLOGISCHE BERICHTE.

Heidelberg, 1947-50.

HANDBUCH DER VÖGEL MITTELEUROPAS.

Frankfurt a. Main, 1966-77.

BROWN, LESLIE.

London, (1959).

BERG, BENGT.

Stockholm, (1916).

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.

MATVEJEV, S.D.

Moskva, 1950.

NEUNZIG, KARL.

Magdeburg, 1907.

SLUD, PAUL.

N.Y., 1964.

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

Kbhvn., 1928-30.

GOODWIN, DEREK.

London, 1967.

LOWERY, GEORGE H.

Louisiana, (1960).

PETERS, HAROLD S. a. THOMAS D. BURLEIGH.

(Cambridge, Mass., 1951).

SIBLEY, CHARLES a. JON E. aHLQUIST.

New Haven, London, (1990).