@article {1041,
	title = {Factors affecting distribution and abundance of hymenopterous parasites of Ips spp. bark beetles in Virginia (Coleoptera: Scolytidae).},
	journal = {Canadian Entomologist},
	volume = {103},
	year = {1971},
	pages = {235-239},
	author = {Berisford, C.W. and Kulman, H.M. and Pienkowski, R.L. and Heikkenen, H.J.}
}
