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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Waggaman, William H.,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1916
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Alunite  Internet resource  Potash  Potassium salts  
  2. By: Smith, Raymond Stratton,
    Publication info: Ithaca, N.Y, 1920
    Holding Institution: Library of Congress
    Subjects: Potassium salts  Soils