PROCESSED AND INTERPRETED U. S. GEOLOGICAL SURVEY SEISMIC REFLECTION PROFILE AND VERTICAL SEISMIC PROFILES, NIOBRARA COUNTY, WYOMING = PROFIL SISMIQUE REFLEXION ET PROFILS SISMIQUES VERTICAUX TRAITES ET INTERPRETES PAR L'U.S. GEOLOGICAL SURVEY, COMTE NIOBRARA, WYOMINGLEE MW; MILLER JJ; RYDER RT et al.1981; U. S. GEOL. SURV., OIL GAS INVEST. CHARTS; USA; DA. 1981; NO OC-0114; 1 SHEETSerial Issue

AEROMAGNETIC MAP OF THE SOUTHERN BLACK HILLS AND PARTS OF SOUTHWESTERN SOUTH DAKOTA AND EASTERN WYOMING = CARTE AEROMAGNETIQUE DU SUD DES BLACK HILLS ET DE SECTEURS DU DAKOTA DU SUD ORIENTAL ET DE L'EST DU WYOMINGHILDENBRAND TG; KUCKS RP.1981; ; USA; DA. 1981; 1 SHEET; BIBL. 2 REF.;[OPEN-FILE REP. (U. S. GEOL. SURV. 1978); ISSN 0196-1497; NO 81-0759]Serial Issue

COMPLETE BOUGUER GRAVITY MAP OF THE SOUTHERN BLACK HILLS, PARTS OF SOUTHWESTERN SOUTH DAKOTA AND EASTERN WYOMING = CARTE COMPLETE DES ANOMALIES GRAVIMETRIQUES DE BOUGUER DU SUD DES BLACK HILLS, DAKOTA DU SUD-OUEST ET WYOMING ORIENTALHILDENBRAND TG; KUCKS RP.1981; ; USA; DA. 1981; 1 SHEET; BIBL. 6 REF.;[OPEN-FILE REP. (U. S. GEOL. SURV. 1978); ISSN 0196-1497; NO 81-0760]Serial Issue