- Harvest and population status of river otter in Wisconsin (Research report / Dept. of Natural Resources) by Bruce E Kohn, 1984
- River otter (L̲u̲t̲r̲a̲ c̲a̲n̲a̲d̲e̲n̲s̲i̲s̲) (Wildlife notebook series / Utah Division of Wildlife Resources) by Ken McDonald, 1991
- River otter survey, 1992-93 (Report) by T. M Cooley, 1993
- River otter: Lutra canadensis lataxina (Wildlife profiles) by Perry W Sumner, 1992
- River otter survey, 1990-91 (Report) by T. M Cooley, 1991
- Status of the Arizona river otter (Lutra canadensis sonora (Rhoads), along the Colorado River in Arizona by Robert B Spicer, 1987
- North American river otter: Lontra canadensis : husbandry notebook by Janice Reed-Smith, 1995
- Water-quality data for Orwell Reservoir and the Otter Tail River near Fergus Falls, Minnesota (Open-file report / U.S. Geological Survey) by M. R Have, 1987
- Skipping lightly through the ... history of the Otter Tail River by Alfred C Seltz, 1999
- Evaluation of experimental river otter reintroductions: Final report by David W Erickson, 1984
- Recent records of the river otter (Lutra canadensis) along the Texas Gulf Coast (Texas journal of science) by Michael A Jackson, 1998
- Otters and river habitat management
- River otter reintroduction in Great Smoky Mountains National Park (TWRA technical report) by Jane M Griess, 1988
- An evaluation of the status of the river otter (Lutra canadensis) in Arkansas / by Paul J. Polechla, Jr. and John A. Sealander (Department of Zoology, ... and U.S. Fish and Wildlife Service by Paul J Polechla, 1985
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