Penguin marking at Heard Island, 1951 and 1953. Home> Scientific research> Publications> Biology> Penguin marking at Heard Island, 1951 and 1953. Summary Authors:Downes M.C. Gwynn A.M. Published in: 1955 Category 3: Article Program area: Biology Downes M.C., Gwynn A.M. (1955) Penguin marking at Heard Island, 1951 and 1953, ANARE Publication, 18 (Interim Report 8, March 1955) 18. 12 pp.; This content was last updated 27 years ago on 30 June 1999.