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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Ballard, W. S. (William Salisbury), - Volck, W. H. (William Hunter),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1914
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Apples  California  Diseases and pests  Powdery mildew diseases
  2. By: Burlingham, Richard. - Darton & Harvey (London, England),
    Publication info: London, Printed for the author, by Darton and Harvey, 55, Gracechurch Street, 1802-[1803]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Aphids  Control  Diseases and pests  Fruit  Fruit-culture  Nectarine  Peach  Powdery mildew diseases  
  3. By: Weiss, Freeman
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, [1940]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Diseases and pests  Plants, Ornamental  Powdery mildew diseases