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  1. By: University of Massachusetts at Amherst. Dept. of Plant and Soil Sciences. - University of Massachusetts at Amherst. Cooperative Extension Service.
    Publication info: Amherst, Mass, Cooperative Extension Service, College of Agriculture, University of Massachusetts, Amherst,
    Holding Institution: UMass Amherst Libraries
  2. By: University of Massachusetts at Amherst. Dept. of Plant and Soil Sciences. - UMass Extension.
    Publication info: Amherst, Mass University of Massachusetts, Dept. of Plant & Soil Sciences [1999-2004]
    Holding Institution: UMass Amherst Libraries