TY - RPRT TI - Stratigraphy, micropaleontology, petrography, carbonate geochemistry, and depositional history of the Proterozoic Libby Formation, Belt Supergroup, northwestern Montana and northeastern Idaho AU - D.L. Kidder PY - 1987 DO - 10.3133/ofr87635 UR - https://pubs.usgs.gov/publication/ofr87635 ID - ofr87635 ER -