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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Brooks, Robert T. - Frieswyk, Thomas S. - Ritter, Arthur. - Northeastern Forest Experiment Station (Radnor, Pa.)
    Publication info: Broomall, Pa, U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1986
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library