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4Accepted Apr 2, 1:57 PM ET

Vander Ploeg Mark A 4

DWSNDAWSON GEOPHYSICAL CO

sec.gov(opens the filing on sec.gov)View full filing

Accepted (ET)

1:57 PM

Apr 2, 2019

Filed

Apr 2, 2019

Documents

1

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5.4 KB

Summary

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