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Burks, B.D. 1979, Torymidae (Agaoninae) and all other families of Chalcidoidea (excluding Encyrtidae). (In: Krombein, K.V.; Hurd, P.D. jr.; Smith, D.R.; Burks, B.D., Editors.) Catalog of Hymenoptera in America North of Mexico
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Smithsonian Institute Press, Washington, D.C.
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Hansson, C. 1994, Re-evaluation of the genus Closterocerus Westwood (Hymenoptera: Eulophidae), with a revision of the Nearctic species. Entomologica Scandinavica
25:17
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Luck, R.F.; Dahlsten, D.L. 1974, Bionomics of the pine needle scale, Chionaspis pinifoliae and its natural enemies at South Lake Tahoe, California. Annals of the Entomological Society of America
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Roberts, F.C.; Luck, R.F.; Dahlsten, D.L. 1973, Natural decline of a pine needle scale population at South Lake Tahoe. California Agriculture
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Yoshimoto, C.M. 1972, A new species of Achrysocharis (Eulophidae, Chalcidoidea) from pine needle scale (Diaspididae, Hom.). Canadian Entomologist
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(Parasitoid identification correct)
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