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By: Waggaman, William H., - Wagner, Cary Richard, - Gardiner, R. F. (Robert Franklin),Edition:Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1918Volume: no.699 (1918)Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects: Phosphate rock Phosphatic fertilizersBHL Collections:
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By: Penrose, R. A. F. (Richard Alexander Fullerton), - Geological Survey (U.S.)Edition:Publication info: Washington Govt. Print. Off 1888Volume: no.46 (1888)Series:Holding Institution: Clemson University LibrariesSubjects: Phosphate rockBHL Collections:
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By: Waggaman, William H., - Fry, William H. (William Henry),Edition:Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1915Volume: no.312 (1915)Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects: Phosphate rock Phosphatic fertilizer industryBHL Collections: