books.google.co.uk - A great diversity of invertebrate life lives beneath the surface of Alberta's lakes and streams. Aquatic Invertebrates of Alberta complements existing field guides to organisms in Alberta, covering all major groups of aquatic invertebrates. Colour photographs, pictorial keys, and 114 whole-specimen drawings...http://books.google.co.uk/books/about/Aquatic_Invertabrates_of_Alberta.html?id=8UQ4jHev6voC&utm_source=gb-gplus-shareAquatic Invertabrates of Alberta
