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  1. By: Ossenbruggen, H. Sharon. - Gamal-Eldin, Jane. - Northeastern Forest Experiment Station (Radnor, Pa.)
    Publication info: [Radnor, PA] :U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station,[1990?]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Aids and devices  Children's plays, American  Media programs (Education)  Teaching  Trees  United States