Biodiversity Heritage Library
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By "Walker, E. M. (1877 - 1969)"
The affinities of the North American species of Gomphus as revealed by the genitalia (Odonata, Gomphidae) /
By: Walker, E. M. - Royal Ontario Museum.
Publication info: Toronto :Royal Ontario Museum,1957.
Contributed by: ROM - University of Toronto (archive.org)
Insects. Part J Orthoptera /
By: Walker, E. M. - Canadian Arctic Expedition
Publication info: Ottawa :T. Mulvey,1920.
Contributed by: Canadiana.org (archive.org)