Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Introducing the Dragonflies of British Columbia and the Yukon
By Robert A. Cannings
Royal British Columbia Museum, 2002
ISBN: 0-7726-4637-6
Cite: 31270 with citation markup [cite:31270]
An absolutely indispensable guide to the Dragonflies of British Columbia (and the Yukon I suppose). Excellent text, identification keys and photographs. More details here:
http://www.royalbcmuseum.bc.ca/serv_prod/friends/publicat/zoology.html

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URL seems down.