PETROLEUM DEVELOPMENT AND TECHNOLOGY (1927 AND 1928-29) - S.E. - Estados Unidos PETROLEUM BRANCH 1956 TEXAS CITY - 623 VOL 77 - 82 LCCN: 59318 Subjects--Topical Terms: ACEITES DE CONGELACIONELECTRICIDADEXTRACCIONPETROLEO-PRODUCCION Dewey Class. No.: 665.5