A 1973 GRAVIMETRIC GEOID OF AFRICA.OBENSON G.1974; IN: SYMP. EARTH'S GRAVITATIONAL FIELD AND SECULAR VAR. IN POSITION. PROC.; SYDNEY; 1973; SYDNEY; UNIV. NEW SOUTH WALES; DA. 1974; PP. (19P.); BIBL. 17 REF.Conference Paper

GEODETIC MAPPING OF AFRICAOBENSON G.1978; BOLL. GEOD. SCI. AFFINI; ITA; DA. 1978; VOL. 37; NO 2-3; PP. 531-542; BIBL. 21 REF.Article

A 1973 GRAVIMETRIC GEOID OF AFRICA.OBENSON G.1974; GEOPHYS. J. ASTR. SOC.; G.B.; DA. 1974; VOL. 37; NO 2; PP. 271-283; BIBL. 17 REF.Article

EVALUATION OF GRAVITY ANOMALIES DIRECTLY FROM SATELLITE OBSERVATIONSOBENSON G.1972; GEOPHYS. J. R. ASTR. SOC.; G.B.; DA. 1972; VOL. 30; NO 1; PP. 69-83; BIBL. 14REF.Serial Issue

COMPARISON OF PREDICTION ACCURACIES OF 5^O X 5^O MEAN GRAVITY ANOMALIES FROM TWO METHODSOBENSON G.1972; BULL. GEOD.; FR.; DA. 1972; NO 106; PP. 425-429; BIBL. 2 REF.Serial Issue

THE COVARIANCE MATRIX FOR DEFLECTIONS OF THE VERTICAL AND UNDULATIONS BASED ON ACTUAL GRAVITY DATAOBENSON G.1970; COLUMBUS; OHIO STATE UNIV.; DA. 1970; PP. (23P.); BIBL. 8REF.Miscellaneous