 | The regeneration of central Appalachian hardwoods with emphasis on the effects of site quality and harvesting practice | (1) |
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 | The regeneration of central Appalachian hardwoods with emphasis on the effects of site quality and harvesting practice / by G.R. Trimble, Jr. Trimble, George R. cn Upper Darby, Pa. : Forest Service, U.S. Dept. of Agriculture, Northeastern Forest Experiment Station, 1973. | |
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