- Distribution and abundance of river otter in Voyageurs National Park, Minnesota (Research/resources management report) by William T Route, 1988
- Survival: Could You Be an Otter? by Roger Tabor, 1989-09
- Baby Otter (All Aboard Science Reader) by Ginjer L. Clarke, 2009-09-17
- The River People: Otters and Their Lives by Philip Wayre, 1989-06-29
- Oscar Otter's Sticker Book: A Maurice Pledger Sticker Book with over 150 Reversible Stickers!
- River Otters and Red Fox --Getting to Know Nature's Children by Laima Dingwall, 1998
- I Am A River Otter: Let Me Tell You About Myself by Olga Majola, 2009-05-06
- The Adventures of Pelican Pete: Annie the River Otter by Frances Keiser, 2006-06-15
- The Otter by Angela Sheehan, 1979-05
- The wilderness world of river otters by Ken L Jenkins, 1998
- Red Fox/River Otters by Merebeth/Dingwall, Laima Switzer, 1985
- around campus.(river otter project in New York, use of X-rays in archeological excavations)(Brief Article): An article from: Community College Week
- The south-west coast of Vancouver Island from Metchosin to Bamfield, including Sooke, Otter, River Jordan and Port Renfrew by Joseph C Lawrence, 1959
- The osteology and myology of the California river otter, by Edna Marie Fisher, 1942
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