Trees of the forest :
their beauty and use /
U.S. Department of Agriculture Forest Service.

APA Citation

United States. Forest Service. (1971). Trees of the forest: their beauty and use. [Rev. ed. Washington: National Forest Service, U.S. Dept. of Agriculture.

MLA Citation

United States. Forest Service. Trees of the Forest: Their Beauty And Use. [Rev. ed. Washington: National Forest Service, U.S. Dept. of Agriculture, 1971.

Warning: These citations may not always be complete (especially for serials).