There's a lot more to the departure of Denver Zoo's polar bears than you've heard - The Colorado Sun

Denver Zoo rehomed its polar bears following a critical federal inspection, a stalled master plan and a funding setback.

Denver Zoo mourns death of polar bear

The Polar Bears Are Leaving The Denver Zoo - 303 Magazine

Polar Bear Denverites Came To Love Dies At Arizona Zoo - CBS Colorado

Aquarium of Quebec - ZooChat

Ethics in Nature Photography.

Denver Zoo Celebrates International Polar Bear Day - CBS Colorado

Master Bibliography 2003 C-D International Society for

Denver Zoo - Wikipedia

Denver zoo polar bear Lee transferred to Columbus Zoo