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References:

Brockman, C.F. 1986. Trees of North America: A Guide to Field Identification. Revised Edition. Western Pub. Co., Inc. 280pp.

Elias, T.S. 1980. The Complete Trees of North America Field Guide and Natural History. Van Nostrand Reinhold Co., N.Y. 948pp.

Harlow, W.M., Harrar, E.S., Hardin, J.W. and White, F.M. 1991. Textbook of Dendrology. McGraw-Hill Inc., N.Y. 501pp.

Petrides, G.A. 1972, A Field Guide to Trees and Shrubs. 2nd edition. Houghton Mifflin Co., Boston. 428pp.

Preston, R.J., Jr. 1989. North American Trees. 4th edition. Iowa State Univ. Press. Ames. 407pp.

Shane, J. 2004. Dendrology Handbook, University of Vermont, Unpublished