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  1. By: Howitt, J. E. (John Eaton), - Caesar, Lawson, - Ontario. Dept. of Agriculture.
    Publication info: Toronto, Dept. of Agriculture, 1917
    Holding Institution: Canadiana.org
  2. By: Howitt, J. E. (John Eaton), - Ontario. Dept. of Agriculture.
    Publication info: Toronto, Dept. of Agriculture, 1908
    Holding Institution: Canadiana.org
  3. By: Howitt, J. E. (John Eaton), - Harrison, F. C. (Francis Charles), - Lochhead, W. - Ontario Agricultural College.
    Edition: Rev. ed.
    Publication info: [Toronto, Dept. of Agriculture], 1916
    Holding Institution: Canadiana.org
  4. By: Howitt, J. E. (John Eaton), - Harrison, F. C. (Francis Charles), - Lochhead, W. - Ontario. Dept. of Agriculture.
    Publication info: Toronto, L.K. Cameron, 1911
    Holding Institution: Canadiana.org
  1. By: Howitt, J. E. (John Eaton),
    Type: Article
    In: The Ottawa naturalist
    Volume: 27
    Issue: 11
    Date: 1914-02
    Page Range: 158--160
    Publication Info: Ottawa, Ottawa Field-Naturalists' Club,