@article {989,
	title = {Study on life table of Quadraspidiotus gigas (Thiem et Gerneck)},
	journal = {Journal of North-East Forestry University, China},
	volume = {15},
	number = {5},
	year = {1987},
	pages = {30-34},
	author = {Liu, K.Y. and Yan, F.J. and Li, X.L.}
}
