Sellers, R. A.; Valkenburg, P.; Squibb, R. C.; Dale, B. W.; Zarnke, R. L. Natality and Calf Mortality of the Northern Alaska Peninsula and Southern Alaska Peninsula Caribou Herds. Ran 2003, 23 (5), 161-166. https://doi.org/10.7557/2.23.5.1697.