TY - RPRT TI - Contribution of organic acids to alkalinity in lakes within the Mount St. Helens blast zone AU - Robert C. Wissman AU - Diane M. McKnight AU - Clifford N. Dahm PY - 2003 DO - 10.4319/lo.1990.35.2.0535 UR - https://pubs.usgs.gov/publication/70171436 ID - 70171436 ER -