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  1. By: Ramsey, Grace Fisher,
    Publication info: New York, N.Y, Dept. of Education, American Museum of Natural History, 1934
    Holding Institution: American Museum of Natural History Library
    Subjects: Project method in teaching  Science projects  
  2. By: Watts, Ralph L. (Ralph Levi),
    Publication info: New York, Orange Judd, 1916, c1912
    Holding Institution: Multiple institutions
    Subjects: Project method in teaching  Vegetable gardening  
  3. By: Watts, Ralph L. (Ralph Levi),
    Publication info: New York, The Macmillan ocmpany, 1922
    Holding Institution: Library of Congress
    Subjects: Project method in teaching  Vegetable gardening  
  4. By: Watts, Ralph L. (Ralph Levi),
    Publication info: New York, Macmillan, 1922
    Holding Institution: Cornell University Library
    Subjects: Project method in teaching  Vegetable gardening