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By "Perkins, Philip D. "
A contribution to the taxonomy of aquatic and humicolous beetles of the family Hydraenidae in southern Africa / Philip D. Perkins, J. Balfour-Browne.
By: Perkins, Philip D. - Balfour-Browne, J. - Field Museum of Natural History.
Publication info: [Chicago, Ill.] :Field Museum of Natural History,c1994.
Contributed by: University of Illinois Urbana Champaign