 | Trimble, George R. | (2) |
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 | Trimble, George R.; The rate of value increase for northern red oak, white oak, and chestnut oak / by George R. Trimble, Jr., and Joseph J. Mendel. Upper Darby, Pa. : Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1969. | |
| Trimble, George R.; Improvement in butt-log grade with increase in tree size, for six hardwood species / by George R. Trimble, Jr. Upper Darby, Pa. : Northeastern Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1965. | |
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