Goodall M J, Volz S A, Johnston J J, Hurlbut D B, Mauldin R E, Griffin D L, Petty E E
USDA/APHIS/National Wildlife Research Center, Analytical Chemistry Project, 3350 Eastbrook Drive, Fort Collins, CO 80525, USA.
Bull Environ Contam Toxicol. 1998 Jun;60(6):877-84. doi: 10.1007/s001289900709.