OCORRENCIA DE COBRE NO GABRO DE MARACAS (RES.).MOREIRA JF DO C; HEDLUND DC.1969; 23.CONGR.BRASIL.-SOC.BRASIL.GEOL.-BOL.ESPEC.-SALVADOR.BAHIA.; 1969(10), NUM. 0001, P. 30 A 31Miscellaneous

TERTIARY VOLCANIC STRATIGRAPHY IN THE POWDERHORN-BLACK CANYON REGION,GUNNISON AND MONTROSE COUNTIES,COLORADO.OLSON JC; HEDLUND DC; HANSEN WR et al.1968; GEOL. SURV. U.S.A., BULL.; USA; 1968, NUM. 1251, P. 1 A 29Miscellaneous

PRECAMBRIAN GEOLOGY ALONG PARTS OF THE GUNNISON UPLIFT OF SOUTHWESTERN COLORADO = GEOLOGIE PRECAMBRIENNE LE LONG DE PARTIES DU SOULEVEMENT DE GUNNISON DANS LE COLORADO SUD-OUESTHEDLUND DC; OLSON JC; EPIS RUDY C et al.1981; GUIDEB. - N. M. GEOL. SOC.; ISSN 0077-8567; USA; DA. 1981; NO 32; PP. 267-272; BIBL. 17 REF.; 2 TAB. ; ILL.Conference Paper

STRATIFORM CHROMITITE AT CAMPO FORMOSO BAHIA, BRAZIL.HEDLUND DC; DE COUTO MOREIRA JF; FERRAZ PINTO AC et al.1974; J. RES. U.S. GEOL. SURV.; U.S.A.; 1974, VOL. 2, NUM. 0005, P. 551 A 562Serial Issue