- Status of the timber wolf in Wisconsin: Performance report, 1 July 1992 to 30 June 1993 (Wisconsin endangered resources report) by Adrian P Wydeven, 1993
- Recovery of the timber wolf, 1988-89 (Wisconsin endangered resources report) by Richard P Thiel, 1989
- THE YELLOWSTONE WOLVES WIN ONE.(appeals court overturns lower court, allowing wolves to remain)(Brief Article): An article from: E by Damon Franz, 2000-05-01
- The Gray Wolf (Endangered and Threatened Animals) by Chris Reiter, 2003-01
- Recent changes in distribution and status of wild red wolves (Canis rufus) (Endangered species report) by Howard McCarley, 1979
- Gray Wolves (True Books: Animals) by Patricia A. Fink Martin, 2003-03
- Wolves (Our Wild World) by Laura Evert, 2000-09
- The Wolf (Endangered Animals & Habitats) by Hayley R. Mitchell, 1998-04
- The Wolves by Brian J. Heinz, Bernie Fuchs, 1996-10-01
- Captivity, inbreeding, cross-lineage matings, and body size in Mexican wolves. (Canid Conservation).: An article from: Endangered Species Update by Richard Fredrickson, Philip Hedrick, 2001-07-01
- Problems and recommendations for the conservation of the maned wolf in Argentina: results from the First Workshop of Chrysocyon brachyurus in Argentina ... An article from: Endangered Species Update by Lucia Soler, Jean Marie Carenton, et all 2005-01-01
- Draft Wisconsin timber wolf recovery plan environmental analysis ([Wisconsin endangered resources report) by Richard P Thiel, 1988
- Status of the timber wolf, 1990-1991 (Wisconsin endangered resources report) by Adrian P Wydeven, 1991
- Status of the timber wolf in Wisconsin: Performance report (Wisconsin endangered resources report) by Richard P Thiel, 1984
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