Biodiversity Heritage Library
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By "Ricker, William Edwin."
The birds of the vicinity of Lake Nipissing, Ontario /
By: Ricker, William Edwin. - Clarke, C. H. D. - Royal Ontario Museum of Zoology.
Publication info: [Toronto :Royal Ontario Museum],1939.
Contributed by: ROM - University of Toronto (archive.org)
The classification, evolution, and dispersal of the winter stonefly genus Allocapnia
By: Ross, Herbert Holdsworth, - Ricker, William Edwin.
Publication info: Urbana,University of Illinois Press
Contributed by: University of Illinois Urbana Champaign