Visitor survey results for the Souris River Loop National Wildlife Refuges [electronic resource] : completion report / by Natalie R. Sexton, Lynn Koontz, and Susan C. Stewart.
Mode of access: Internet from the USGS web site. Address as of 12/17/07: http://www.fort.usgs.gov/products/publications/21560/21560.pdf; current access via PURL.
Note
Title from PDF title screen (viewed on Mar. 23, 2006).