TY - RPRT TI - Microfossil assemblages from the Eocene Sylhet Limestone and Kopili Formation, Sylhet District, northeast Bangladesh AU - Elisabeth M. Brouwers AU - M.R. Khan AU - Afia Akhtar PY - 1992 DO - 10.3133/ofr92191 UR - https://pubs.usgs.gov/publication/ofr92191 ID - ofr92191 ER -