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# 9781552093306 WATERSHEDS by Clive Dobson and Gregory Gilpin Beck A practical handbook for healthy water that provides a fascinating overview of the fundamentals of ecology from the simple concept of a watershed to the biological intricacies of a wetland ecosystem and its implications on the environment. Firefly. 152 pages, 21 x 26 cm, paperback, 1999. Retail: $19.95 My Price: $18.00