Geoquest International Ltd.

GeoQuest, a division of Schlumberger Technology Corporation

Georgallis Peter C.

George Nicholas C.

George Nicholas Claude

Georgi Dan T.

Geosensor Corporation

GeoSensor Corporation

GeoServices S.A.

Geospace Engineering Resources International, L.P.

Geospace Engineering Resources International, LP

Geospace Technologies LP

Geotech Engineering

Geotrace Technologies, Inc.

Gerdt David William

Geren Keith E.

Gerosa William A.

Gershonowitz Mitchell S.

Gerstein Edmund R.

Gerstein Laura A.