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		The odonata of Canada and Alaska. Volume two, part III, The anisoptera-four families / by Edmund M. Walker. by Walker, Edmund M [author.] Material type: Text; Format: available online ; Literary form: Not fiction Publisher: [Toronto, Ontario] : University of Toronto Press, 1958Copyright date: ©1958 Online resources: Click to View Availability: Items available for loan: Colombo (1). Jaffna (1). Kandy (1).
		The odonata of Canada and Alaska. Volume three, part III, The anisoptera-three families / by Edmund M. Walker and Philip S. Corbet. by Walker, Edmund M [author.] Corbet, Philip S [author.] Material type: Text; Format: available online ; Literary form: Not fiction Publisher: Toronto, [Ontario] ; London, [England] : University of Toronto Press, 1978Copyright date: ©1978 Online resources: Click to View Availability: Items available for loan: Colombo (1). Jaffna (1). Kandy (1).

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