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UNITED STATES - Core Laboratories

QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 1998 o OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the

CORE LABORATORIES N.V.

Form 10-K for the Fiscal Year Ended December ... - Core Laboratories

1Q - 2013 - Core Laboratories