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SC 13G

Amended Statement of Ownership

DAWSON GEOPHYSICAL CO Filed 2011-02-01 Acc 0001144204-11-005149

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SC 13G Amended Statement of Ownership , v209543_sc13g.htm

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2011-02-11 SC 13G Amended Statement of Ownership
2011-02-01 SC 13G Amended Statement of Ownership
2011-01-31 SC 13G Amended Statement of Ownership
2011-01-25 SC 13G/A Amended Statement of Ownership

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