Note 19 — THE BIOLOGY AND ECOLOGY OF MARINE BIRDS IN THE NORTH
Reading edition
Principal sources: Bent 1925; Cleaver and Franett 1945; Cottam 1939; Cottam and Knappen 1939; Kortright 1942; Mabbot 1920; McGilvrey 1967; Munro and Clemens 1939; Roberts and Huntington 1959.