Special review The Helsinki Congress and the future
01 October 1960
Proceedings of the XII International Ornithological Congress (Helsinki, 5th-i2th June 1958). Edited by G. Bergman, K. O. Donner and L. von Haartman. Tilgmannin Kirjapaino, Helsinki, i960. Vol. I, 436 pages; Vol. II, 384 pages; both with diagrams, maps and...