A catalogue of the Nearctic Chalcidoidea of Czechoslovakia (Insecta: Hymenoptera).
Ottawa: Entomological Society of Canada, 1963. Octavo, Binder's cloth, inscribed by the author to Edgar Riek. The Canadian Entomologist, Supplement Number 30. More
Ottawa: Entomological Society of Canada, 1963. Octavo, Binder's cloth, inscribed by the author to Edgar Riek. The Canadian Entomologist, Supplement Number 30. More