INTERNATIONAL SEISMIC CREW COUNT

-------- Quarter ended -------- December 1991 September 1991 Land Marine Land Marine U.S 66 19 4 14 Canada 32 0 19 3 Mexico 23 0 22 4 Cent. & S. America 50 3 56 4 Europe 32 36 40 47 Middle East 41 2 37 1 Africa

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