Hurd, P.D.; Linsley, E.G. Bee family Oxaeidae with a revision of the North American species (Hymenoptera: Apoidea)
West, G. A Comparative Study of the dominant Phanerogamic and Higher Cryptogamic Flora of Aquatic Habit, in Three Lake Areas of Scotland [with] A Further Contribution to a Comparative Study of the dominant Phanerogamic and Higher Cryptogamic Flora of Aquatic Habit
Bellman, H. A Field Guide to the Grasshoppers and Crickets of Britain and Northern Europe
Entomologist's Gazette. Vol. 12, Part 3 (1961)
Harvey, L.A.; St. Leger-Gordon, D. Dartmoor (New Naturalist 27)
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