References

Borror, Donald J., Charles A. Triplehorn, Norman F. Johnson.  1989.  An introduction to the study of insects.  Philadelphia; Saunders.

Borror, Donald, J., Richard E. White.  1970. A field guide to the insects of America north of Mexico.  New York; Houghton Mifflin.

Covell, Charles V., Jr.  1984.  A field guide to moths – Eastern North America.  New York; Houghton Mifflin.

Elpell, Thomas J.  2004.  Botany in a day – The patterns method of plant identification.  Pony, Montana; HOPS.

Fleming, G. P.  2002.  Ecological communities of the Bull Run Mountains, Virginia: baseline vegetation and floristic data for conservation planning and natural area stewardship.  Natural Heritage Tech. Rep. 02-12.  Virginia Department of Conservation and Recreation, Division of Natural Heritage, Richmond.

Klots, Alexander B.  1951.  A field guide to the butterflies of North America, East of the Great Plains.  New York; Houghton Mifflin.

Levi, Herbert W., Lorna R. Levi.  1968.  Spiders and their kin.  New York; Golden.

Martof, Bernard S. et al.  1980.  Amphibians and reptiles of the Carolinas and Virginia.  Chapel Hill; Univ. of North Carolina Press.

Mitchell, Robert T., Herbert S. Zim.  Butterflies and moths – A guide to the more common American species.  New York; Golden.

Pennak, Robert W.  1989.  Fresh-water invertebrates of the United States – Protozoa to mollusca.  New York; Wiley Interscience.

Newcomb, Lawrence.  1977.  Newcomb’s wildflower guide. New York; Little, Brown and Co.

Virginia Society of Ornithology, Northern Virginia Chapter.  1983.  Birds of the Arlington Outdoor Lab – list.

Webster, Wm. David, James E. Parnell, Walter C. Biggs, Jr.  1985.  Mammals of the Carolinas, Virginia, and Maryland.  Chapel Hill; Univ. of North Carolina Press.

 White, Richard.  1983.  A field guide to the beetles of North America.  New York; Houghton Mifflin.