TY - RPRT TI - Use of natural 35 S to trace sulphate cycling in small lakes, Flattops Wilderness Area, Colorado, U.S.A. AU - Robert L. Michel AU - John T. Turk AU - Donald H. Campbell AU - M. Alisa Mast PY - 2002 DO - 10.1023/a:1020177802927 UR - https://pubs.usgs.gov/publication/70179843 ID - 70179843 ER -