TY - RPRT TI - Weathering processes and the composition of inorganic material transported through the Orinoco River system, Venezuela and Colombia AU - R.F. Stallard AU - L. Koehnken AU - M. J. Johnsson PY - 1991 DO - 10.1016/0016-7061(91)90069-6 UR - https://pubs.usgs.gov/publication/70016426 ID - 70016426 ER -