- Notice of Effectiveness (EFFECT)
26 Septembre 2011 - 12:00PM
Edgar (US Regulatory)
UNITED STATES
|
SECURITIES AND EXCHANGE COMMISSION
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Washington, D.C. 20549
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NOTICE OF EFFECTIVENESS
|
|
Effective Date:
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September 23,
2011
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Form:
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S-4
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CIK:
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0000351231
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Company Name:
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DAWSON GEOPHYSICAL CO
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File Number:
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333-174843
|
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