If you do not have an Adobe Acrobat pdf file reader, you can download a free copy from Adobe (off-site link).

Weir, L., I. Fiske, and J. A. Royle. 2009. Trends in anuran occupancy from northeastern states of the North American Amphibian Monitoring Program. Herpetological Conservation and Biology 4(3):389-402. PDF available

Royle, J.A. and W.A. Link. 2005. A general class of multinomial mixture models for anuran calling survey data. Ecology 86:2505-2512.

Weir, L. A. and M. J. Mossman. 2005. North American Amphibian Monitoring Program (NAAMP). Pp. 307-313 in M. Lannoo (editor) Amphibian Declines: conservation status of United States amphibians. University of California Press.

Weir, L. A., J. A. Royle, P. Nanjappa, and R. E. Jung. 2005. Modeling anuran detection and site occupancy on North American Amphibian Monitoring Program (NAAMP) routes in Maryland. Journal of Herpetology 39(4): 627-639.