TY - BOOK AU - Richards,Paul W ED - Billings Geological Society. TI - Guidebook, fifth annual field conference, September 9-11, 1954: Pryor Mountains - Northern Bighorn Basin, Montana AV - QE46 .B5 1954 PY - 1954///] CY - Billings ? Mont. KW - Geology KW - Montana N1 - Includes bibliographies UR - http://www.archive.org/details/guidebookfifthan00bill UR - http://www.openlibrary.org/books/OL24610463M ER -