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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Richardson, Mary Lou. - Betters, David R. - Sampson, George Roger, - Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)
    Publication info: Fort Collins, Colo, Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1981
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library