TY - RPRT TI - Stable isotope and trace element studies of black bear hair, Big Bend ecosystem, Texas and Mexico AU - W.C. Pat Shanks AU - Eric C. Hellgren AU - Craig A. Stricker AU - Pamela A. Gemery-Hill AU - David P. Onorato PY - 2008 UR - https://pubs.usgs.gov/publication/70180879 ID - 70180879 ER -