Weeds of Colorado: A Comprehensive Guide to Identification
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Fundamentals of Weed Science
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Agriculture's Ethical Horizon
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Weeds and Words: The Etymology of the Scientific Names of Weeds and Crops
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When That Day Comes: A Memoir
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Weed Science - A Plea for Thought - Revisited
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Six Chemicals That Changed Agriculture
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A History of Weed Science in the United States
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Agricultural Ethics - An Invitation
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