TY - RPRT TI - Chemical and optical changes in freshwater dissolved organic matter exposed to solar radiation AU - C.L. Osburn AU - D.P. Morris AU - K. A. Thorn AU - R.E. Moeller PY - 2001 DO - 10.1023/a:1010657428418 UR - https://pubs.usgs.gov/publication/70023231 ID - 70023231 ER -