au.\*:("SONIDO EP")
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A REVIEW OF THE GRAVITY DATA ON THE CENTRAL VALLEY BASIN, LUZON, PHILIPPINESSONIDO EP.1977; J. GEOL. SOC. PHILIPPINES; PHL; DA. 1977; VOL. 31; NO 2; PP. 1-17; BIBL. 3 REF.; 5 ILL.Article
THE STATE OF GRAVITY WORKS IN THE PHILIPPINES = L'ETAT DES TRAVAUX DE GRAVIMETRIE AUX PHILIPPINESSONIDO EP.1981; J. GEOL. SOC. PHILLIP; ISSN 0368-2331; PHL; DA. 1981; VOL. 35; NO 3; PP. 37-50; ILL.Article
APPRAISAL OF PRESENT PETROLEUM-EXPLORATION ACTIVITIES IN PHILIPPINESSONIDO EP.1978; AMER. ASS. PETROLEUM GEOLOGISTS BULL.; USA; DA. 1978; VOL. 62; NO 12; PP. 2512-2513Conference Paper
EXPLORATION FOR DISSEMINATED COPPER DEPOSITS IN HUMID, MOUNTAINOUS, TROPICAL TERRAIN. SECTION 4 -GEOPHYSICAL SURVEYING.SONIDO EP; MIJNE M.1968; BUR. MINES, REP. INVEST.; PHL; 1968(8), NUM. 0066, P. 35 A 47Miscellaneous