TY - RPRT TI - Mechanisms controlling Cu, Fe, Mn, and Co profiles in peat of the Filson Creek Fen, northeastern Minnesota AU - K. Walton-Day AU - L.H. Filipek AU - C. S.E. Papp PY - 1990 DO - 10.1016/0016-7037(90)90111-w UR - https://pubs.usgs.gov/publication/70015976 ID - 70015976 ER -