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close this section of the librarySubdivisions of the genus Pinus (pines)(1)
View the documentSubdivisions of the genus Pinus (pines) / by Elbert L. Little, Jr. and William B. Critchfield. Little, Elbert Luther, 1907- 2n Washington, D.C. : U.S. Dept. of Agriculture, Forest Service, 1969.