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Rockhounding New England: A Guide To 100 Of The Region's Best Rockhounding Sites
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Rockhounding Oregon: A Guide to the State's Best Rockhounding Sites (Rockhounding Series)
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Rockhounding Texas (Falcon Guide)
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Rockhounding Utah: A Guide To The State's Best Rockhounding Sites
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Rocks and Minerals
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Rocks and Minerals (Field Guide and Introduction to the Geology and Chemistry of)
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Rocks and Minerals: (Eyewitness Handbooks)
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Rocks and Minerals: A Guide to Field Identification (Golden Field Guide f/St. Martin's Press)
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Rocks and Rock Minerals
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Rocks from Space: Meteorites and Meteorite Hunters (Astronomy)
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Rocks Remain
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Rocky Mountain Birds: Easy Identification
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Rocky Mountain Flower Finder: A Guide to the Wildflowers Found Below Tree Line in the Rocky Mountains
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Rocky Mountain Tree Finder a Manual for Identifying Rocky Mountain Trees
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Rocky Mountain Wildflowers (pocket guide)
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Rocky Mountains to the World: History of the Colorado School of Mines
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Rodents of the World (Of the World Series)
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Rogawski s Calculus for AP*: Early Transcendentals
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Rogawski's Calculus for AP*
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Rogue Asteroids and Doomsday Comets
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Rogue Primate: An Exploration of Human Domestication
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Role of Mathematics in Science (ANNELI LAX NEW MATHEMATICAL LIBRARY)
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Roller Coaster: Wooden and Steel Coasters, Twisters and Corkscrews
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Romance of the Sea
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Romancing the Vine: Life, Love, and Transformation in the Vineyards of Barolo
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Rooted in the Land: Essays on Community and Place
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Round Like a Ball
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Round River: From the Journals of Aldo Leopold
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Rounding Errors in Algebraic Processes
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Rubicon (Sentinels)
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Ruby & Sapphire
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Rule Based Expert Systems: The Mycin Experiments of the Stanford Heuristic Programming Project
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Run, River, Run: A Naturalist's Journey Down One of the Great Rivers of the West
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Running the River: Secrets of the Sabine (River Books, Sponsored by The Meadows Center for Water and the Environment, Texas State University)
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Running with Sherman: The Donkey with the Heart of a Hero
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Rusty Robot
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