TY - RPRT TI - The record of global change in mid-Cretaceous (Barremian-Albian) sections from the Sierra Madre, Northeastern Mexico AU - T.J. Bralower AU - E. Cobabe AU - B. Clement AU - W.V. Sliter AU - C.L. Osburn AU - J. Longoria PY - 1999 UR - https://pubs.usgs.gov/publication/70021256 ID - 70021256 ER -