au.\*:("FERENCIC A")
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YACIMIENTOS DE MENA FERRIFERA DEL DISTRITO DE SAN ISIDRO, ESTADO BOLIVAR = GISEMENTS DE LA MINE FERRIFERE DU DISTRICT DE SAN ISIDRO, ETAT DE BOLIVARFERENCIC A.1970; BOL. GEOL.; VENEZ. ; 1970, VOL. 11, NUM. 0021, P. 207 A 318Serial Issue
METALLOGENIC PROVINCES AND EPOCHS IN SOUTHERN CENTRAL AMERICA.FERENCIC A.1971; MINER. DEPOSITA; DEU; 1971, VOL. 6, NUM. 0001, P. 77 A 88Miscellaneous
