1. Nature. Bears of the last frontier. Part 1, City of bears Publication/Creation: Arlington, VA : Public Broadcasting Service (PBS), 2011 Resource Type: Video or Visual Material Access & Availability: Loading
2. Nature. Bears of the last frontier. Part 2, The road north Publication/Creation: Arlington, VA : Public Broadcasting Service (PBS), 2011 Resource Type: Video or Visual Material Access & Availability: Loading
3. Nature. Bears of the last frontier. Part 3, Arctic wanderers Publication/Creation: Arlington, VA : Public Broadcasting Service (PBS), 2011 Resource Type: Video or Visual Material Access & Availability: Loading
4. Nature. Season 30, Episode 6, Fortress of the bears Publication/Creation: Arlington, VA : Public Broadcasting Service (PBS), 2012 Resource Type: Video or Visual Material Access & Availability: Loading