The egg-laying and incubation periods of Rockhopper, Macaroni and Gentoo Penguins
Sydney: Antarctic Divsion, 1953. Quarto, wrappers. "With the author's compliments A. M. Gwynn". 29 A.N.A.R.E. Reports, Series B, volume 1 Zoology. More
Andrew Isles Natural History Books
