00970cam a2200277   4500001001300000003000400013005001700017008004100034010002200075040003100097050001600128051003200144100002000176245009600196260003000292300003700322490005000359500005300409504002800462650002700490650003000517650003700547650003800584830005300622999001700675gs 67000323 DLC20260227111421.0700407s1967    nduab    b    00010 eng c  ags 67000323 //r84  aU.S. Geol. Survey. Library0 aQE149b.D67  aQE149b.A23 no. 52cCopy 2.10aDow, Wallace G.14aThe spearfish formation in the Williston Basin of western North Dakota,cby Wallace G. Dow.0 aGrand Forks, N.D.,c1967.  aii, 28 p.billus., maps.c23 cm.1 aNorth Dakota. Geological Survey. Bulletinv52  aPart of the illustrative matter fold. in pocket.  aBibliography: p. 27-28. 0aGeologyzNorth Dakota. 0aGeologyzWilliston Basin. 0aGeology, StratigraphicyPermian. 0aGeology, StratigraphicyTriassic. 0aBulletin (North Dakota Geological Survey) ;v52.  c30397d30397