Field guide to recently introduced species of Coccinellidae (Coleoptera) in North America
By Robert Gordon and Natalia Vandenberg
Full citation:
Gordon, R., and Vandenberg, N. 1991. Field guide to recently introduced species of Coccinellidae (Coleoptera) in North America, with a revised key to North American genera of Coccinellini. Proceedings of the Entomological Society of Washington 93:845-864.
Available online:
http://biostor.org/reference/56473