 | Gatchell, Charles J. cn | (1) |
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 | Gatchell, Charles J. cn; Pendulum impact tests of wooden and steel highway guardrail posts / by Charles J. Gatchell and Jarvis D. Michie. Upper Darby, Pa. : Forest Service, U.S. Dept. of Agriculture, Northeastern Forest Experiment Station, 1974. | |
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