Gray, P. (ed.) 1961. The encyclopedia of the biological sciences. New York: Van Nostrand Reinhold Co., xxi + 1119 pp.
Gray, P. (ed.) 1970. The encyclopedia of the biological sciences, 2nd edition. New York: Van Nostrand Reinhold Co., xxxv + 1027 pp.
Greenslade, P. J. M. 1979. A guide to ants of South Australia. Adelaide: South Australian Museum (Special Educational Bulletin Series), 44 pp.