TY - BOOK ID - 137294123 TI - Changes in stratigraphic nomenclature by the U. S. Geological Survey, 1977 AU - Sohl, Norman F. AU - Wright, Wilna B. PY - 1978 PB - Washington United States Geological Survey, Department of the Interior DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:137294123 AB - ER -