TY - RPRT TI - Stable isotopes and sediments from Pickerel Lake, South Dakota, USA: A 12ky record of environmental changes AU - A. Schwalb AU - W.E. Dean PY - 1998 DO - 10.1023/a:1007971226750 UR - https://pubs.usgs.gov/publication/70021346 ID - 70021346 ER -