TY - RPRT TI - Geochemical and lead-isotopic studies of river sediment from major tributaries, upper Arkansas River watershed, Colorado AU - S. E. Church AU - David L. Fey AU - Daniel M. Unruh PY - 2000 DO - 10.3133/ofr00337 UR - https://pubs.usgs.gov/publication/ofr00337 ID - ofr00337 ER -