 | Spencer, John S. cn | (1) |
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 | Spencer, John S. cn; Timber products output in Colorado, Wyoming, and western South Dakota, 1962 / by John S. Spencer, Jr. and Thomas O. Farrenkopf. Ogden, Utah : Intermountain Forest & Range Experiment Station, and Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1964. | |
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