TY - RPRT TI - Ecology and distribution of major diatom ecotypes in the southern Fort Union coal region of Montana AU - L.L. Bahls AU - E.E. Weber AU - J.O. Jarvie PY - 1984 DO - 10.3133/pp1289 UR - https://pubs.usgs.gov/publication/pp1289 ID - pp1289 ER -