Browsing Dalhousie University Libraries by Author "Walker, E.M."
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Additions to the list of odonata of the Maritime provinces
Walker, E.M.; Nova Scotian Institute of Science (Imperial Publishing Co., Ltd., 1940) -
The odonata of the Maritime provinces
Walker, E.M.; Nova Scotian Institute of Science (Wm. Macnab & Son, 1934)