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TGC INDUSTRIES INC

SIC 1382 · Oil & Gas Field Exploration Services
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$DWSN

TGC INDUSTRIES INC

CIK:0000799165|SEC Filings

INDENTURES

EX-4.2
dwsn-20241231xex4d2.htm
2025-04-02T00:00:00Z
EX-4.2
dwsn-20231231xex4d2.htm
2024-04-01T00:00:00Z
EX-4.2
dwsn-20221231xex4d2.htm
2023-03-13T00:00:00Z
EX-4.2
dwsn-20211231xex4d2.htm
2022-03-18T00:00:00Z
EX-4.2
dwsn-20201231xex4d2.htm
2021-03-16T00:00:00Z
EX-4.2
dwsn-20191231ex4211b3e03.htm
2020-03-06T00:00:00Z
EX-4.2
dwsn-20251231xex4d2.htm
2026-03-31T00:00:00Z
EX-4.1
tm2130885d1_ex4-1.htm
2021-10-25T00:00:00Z
EX-4.1
tm2112467d1_ex4-1.htm
2021-04-08T00:00:00Z
EX-4.1
a15-4273_1ex4d1.htm
2015-02-11T00:00:00Z
EX-4.3
a07-25779_1ex4d3.htm
2007-11-07T00:00:00Z
EX-4.1
a07-11719_1ex4d1.htm
2007-04-19T00:00:00Z
EX-4.15
a05-15384_1ex4d15.htm
2005-09-20T00:00:00Z
EX-4.16
a05-15384_1ex4d16.htm
2005-09-20T00:00:00Z
EX-4.14
a05-15384_1ex4d14.htm
2005-09-20T00:00:00Z
EX-4.1
a05-15384_1ex4d1.htm
2005-09-20T00:00:00Z
EX-4.7
a05-5936_1ex4d7.htm
2005-03-30T00:00:00Z