Showing 1 - 2 results of 2 for search 'Perkins, Walter S', query time: 0.02s Refine Results
  1. 1
    Determination for the modal age level for the grades IV and VI of the difficulty of the principle: "The amount of momentum possessed by an object depends upon its weight and speed of motion.
    by Perkins, Walter S
    Published 2014
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  2. 2
    Systematics of Saxifraga rufidula and related species from the Columbia River gorge to southwestern British Columbia
    by Perkins, Walter Ethen
    Published 2010
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