0000929966-02-000021 8-K 1 20021018 5 20021022 TGC INDUSTRIES INC 0000799165 2673 742095844 TX 1231 8-K 34 000-14908 02795059 1304 SUMMIT AVE STE 2 PLANO TX 75074 9728811099 1304 SUMMIT AVE STE 2 PLANO TX 75074 8-K 1 form8kcontract.txt TGC INDUSTRIES, INC. FORM 8-K