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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Acorn, Robert C. - Dorrance, Michael J.
    Edition: 4th revision.
    Publication info: Edmonton, Alta, Alberta Agriculture, Food and Rural Development, 1998
    Holding Institution: University of Alberta Library
  2. By: Dorrance, Michael J. - Alberta. Soil and Crop Management Branch.
    Publication info: Edmonton, Alta, Alberta Agriculture, Food and Rural Development, 1994
    Holding Institution: University of Alberta Library