WYOMING GEOLOGICAL ASSOCIATION. 20TH FIELD CONFERENCE. CASPER, SEPTEMBER 23-25, 1968. BLACK HILLS AREA, SOUTH DAKOTA, MONTANA, WYOMING. GUIDEBOOK.WULF GR.1968; CASPER.WYOMING.GEOL.ASS.PUBL.SOUS.LA.DIRECT.DE.WULF.G.R.; 1968, P. 1 A 244Miscellaneous

LOWER CRETACEOUS MUDDY SANDSTONE IN THE NORTHERN ROCKIES.WULF GR.1968; IN:"WYOMING.GEOL.ASS.20TH.FIELD.CONF.CASPER-1968.BLACK.HILLS.AREA-SOUH .DAKOTA-MONTANA-WYOMING".CASPER-WYOMING.GEOL.ASS.; 1968, P. 29 A 34Miscellaneous