Northern Prairie Wildlife Research Center
Agresti, A. 1990. Categorical data analysis. John Wiley and Sons, Inc., New York. 558 p. Ferris, C. D. (ED.). 1989. Supplement to: A catalogue/checklist of the butterflies of America north of Mexico. Lepidopersists' Soc. Mem. No. 3. 103 p. Hellawell, J. M. 1991. Development of a rationale for monitoring, p. 1-14. In: F. Goldsmith (ed.). Monitoring for conservation and ecology, Chapman and Hall, London. McCabe, T. L. and R. L. Post. 1976. The North Dakota butterfly calendar. J. Res. Lepid., 15:93-99. Miller, L. D. and F. M. Brown. 1981. A catalogue/checklist of the butter- flies of America north of Mexico. Lepidopersists' Soc. Mem. No. 2. 280 p. Miller, J. Y. (ED.). 1992. The common names of North American butterflies. Smithsonian Institution Press, Washington, D.C. 177 p. Milliken, G. A. and D. E. Johnson. 1984. Analysis of messy data. Vol. I: Designed experiments. Van Nostrand Reinhold Co., New York. 473 p. Moffat, M. and N. McPhillips. 1993. Management for butterflies in the northern Great Plains: a literature review and guidebook for land managers. U.S. Fish and Wildlife Service, Pierre, SD. 19 p. North American Butterfly Association. 1995. Checklist and English names of North American butterflies. North American Butterfly Association, Morristown, N.J. 25 p. Opler, P. A. (ED.). 1995. Lepidoptera of North America. 2. Distribution of butterflies (Papilionoidea and Hesperioidea) of the eastern United States. Contributions of the C. P. Gillette Museum of Insect Biodiversity. Colorado State University Department of Entomology, Fort Collins. 172 p. Pollard, E. 1977. A method for assessing changes in the abundance of butterflies. Biol. Conserv., 12:115-134. ______. 1982. Monitoring butterfly abundance in relation to the management of a nature reserve. Biol. Conserv., 24:317-328. ______ and T. J. Yates. 1993. Monitoring butterflies for ecology and conservation. The British butterfly monitoring scheme. Institute of Terrestrial Ecology and Joint Nature Conservation Committee. Chapman and Hall, London. 274 p. ______, D. O. Elias, M. J. Skelton, and J. A. Thomas. 1975. A method of assessing the abundance of butterflies in Monks Wood National Nature Reserve in 1973. Entomol. Gaz., 26:79-88. Rosenzweig, M. L. 1995. Species diversity in space and time. Cambridge University Press, NY. 436 p. Royer, R. A. 1988. Butterflies of North Dakota: An atlas and guide. Minot State Univ. Sci. Monogr. No. 1. Minot, N.D. 192 p. Samways, M. J. 1994. Insect Conservation Biology. Chapman and Hall, London. 358 p. SAS Institute, Inc. 1989. SAS/STAT user's guide. Version 6, 4th ed., vol. 2. SAS Institute, Inc., Cary, NC. 846 p. Stanford R. E. and P. A. Opler (EDS.). 1993. Atlas of western USA butterflies. Denver, Colo. 275 p. Stewart, R. E. and H. A. Kantrud. 1971. Classification of natural ponds and lakes in the glaciated prairie region. U. S. Fish and Wildl. Serv., Resour. Publ. 92. 57 p. Swengel, A. 1990. Monitoring butterfly populations using the Fourth of July butterfly count. Am. Midl. Nat., 124:395-406. ______. 1996. Effects of fire and hay management on abundance of prairie butterflies. Biol. Conserv., 76:73-85.