Authors: Downs, R. J.; Piringer, A. A.
Source: Forest Science, Volume 4, Number 3, 1 September 1958, pp. 185-195(11)
Publisher: Society of American Foresters
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Document Type: Journal Article
U.S. Department of Agriculture, Agricultural Research Service, Crops Research Division, Pioneering Research Group, Plant Industry Station, Beltsville, Md.
Publication date: September 1, 1958