- Libro electrónicoEcological Studies of the Timber Wolf in Northeastern MinnesotaL. David Mech
- Libro electrónicoAn Experimental Translocation of the Eastern Timber WolfRichard A. Hook
- Libro electrónicoEcological Studies of the Timber Wolf in Northeastern MinnesotaRobert R. Ream
- Libro electrónicoAn Experimental Translocation of the Eastern Timber WolfRichard A. Hook