TY - RPRT TI - Sex identification of polar bears from blood and tissue samples AU - Steven C. Amstrup AU - G.W. Garner AU - M. A. Cronin AU - J.C. Patton PY - 1993 DO - 10.1139/z93-305 UR - https://pubs.usgs.gov/publication/70181818 ID - 70181818 ER -