TY - RPRT TI - Precision of hard structures used to estimate age of mountain Whitefish ( Prosopium williamsoni ) AU - Carson J. Watkins AU - Tyler J. Ross AU - Ryan S. Hardy AU - Michael C. Quist PY - 2015 DO - 10.3398/064.075.0102 UR - https://pubs.usgs.gov/publication/70173557 ID - 70173557 ER -