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| References |
| Dirr,
Michael A. Dirr’s Hardy Trees and Shrubs. Portland: Timber
Press, 1997 |
| Dirr,
Michael A. Manual of Woody Landscape Plants. Champaign: Stripes
Publishing Co., 1998 |
| Little,
Elbert L. The Audubon Society Field Guide to North
American Trees, Eastern Region. New York: Knopf
Publishing, 1984 |
| Whitman,
Ann H. The National Audubon Society Pocket Guide:
Familiar Trees of North America, East. New York:
Knopf Publishing, 1986 |
| McElhattan,
Kenton E. Tree Guide-Bird Park and Vicinity. Mt. Lebanon: Nature
Conservancy, 1994 |
| Rushforth,
Keith. International Paper Pocket Guide to Trees. Mitchell Beasly
International, 1980. Reprinted 1990 and 1992 |
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