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Little, Elbert Luther ,  Critchfield, William B. ,  [Subdivisions of the genus pine (pines)] ,  Subdivisions of the genus pine (pines)

Little, Elbert Luther ,  [Atlas of the United States trees. V.1: Conifers and important hardwoods] ,  Atlas of the United States trees. V.1: Conifers and important hardwoods

Little, Elbert Luther ,  Viereck, Leslie A. ,  [Atlas of the United States trees. V.2: Alaska trees and common shrubs] ,  Atlas of the United States trees. V.2: Alaska trees and common shrubs

Little, Elbert Luther ,  [Atlas of the United States trees. V.3: Minor western hardwoods] ,  Atlas of the United States trees. V.3: Minor western hardwoods