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Evaluation of the sensitivity of inventory and monitoring national parks to acidification effects fr

Sullivan, Timothy J. (Timothy Joseph), 1950- author.
Denver, Colorado : U.S. Department of the Interior, National Park Service, Natural Resource Program Center, 2011. 2011

Evaluation of the sensitivity of inventory and monitoring national parks to nutrient enrichment effe

Sullivan, Timothy J. (Timothy Joseph), 1950- author.
Denver, Colorado : U.S. Department of the Interior, National Park Service, Natural Resource Program Center, 2011. 2011

National Park Service vegetation inventory program.

Hop, Kevin D., author.
Fort Collins, Colorado : U.S. Department of the Interior, National Park Service, Natural Resource Stewardship and Science ; La Crosse, Wisconsin : USGS ; St. Paul, Minnesota : NatureServe, 2012. 2012

Saint Croix National Scenic Riverway : acoustic monitoring report

Nelson, Misty D., author.
Fort Collins, Colorado : U.S. Department of the Interior, National Park Service, Natural Resource Stewardship and Science, 2014. 2014

Time and the river : a history of the Saint Croix : a historic resource study of the Saint Croix Nat

McMahon, Eileen M.
Omaha, Neb. : Midwest Regional Office, National Park Service, U.S. Dept of the Interior, 2002. 2002