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Please read BHL's Acknowledgment of Harmful Content
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  1. By: McKee, Roland,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1935
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Forage plants  Seeds  Vernalization  
  2. By: Murneek, Andrew Edward,
    Publication info: Waltham, Mass, Chronica Botanica Co, 1948
    Holding Institution: MBLWHOI Library
    Subjects: Photoperiodism  Vernalization