Author: Mortensen, H. Chr. C.
Title: Studies in Bird Migration, Being the Collected Papers of H. Chr. C. Mortensen, 1856-1921
Description: Copenhagen, Munksgaard, 1950. Edited by Poul Jespersen & Å. Vedel Tåning. 270 [2]p. b/w illus. original stiff wrappers, partially unopened. .

Keywords: Birds Ornithology