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Filing Detail
Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend]
SEC Accession No. 0000354204-12-001328
Filing Date
2012-02-14
Accepted
2012-02-14 08:53:53
Documents
1

Document Format Files

Seq Description Document Type Size
1 SCHEDULE 13G/A rrd573.htm SC 13G/A 50175
  Complete submission text file 0000354204-12-001328.txt   51787
Mailing Address 6300 BEE CAVE ROAD BUILDING ONE AUSTIN TX 78746
Business Address 6300 BEE CAVE ROAD BUILDING ONE AUSTIN TX 78746 (512) 306-7400
DIMENSIONAL FUND ADVISORS LP (Filed by) CIK: 0000354204 (see all company filings)

IRS No.: 222370029 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G/A
SIC: 0000

Mailing Address 2911 SCR 1260 MIDLAND TX 79706
Business Address 2911 SCR 1260 MIDLAND TX 79706 9155633974
NATURAL GAS SERVICES GROUP INC (Subject) CIK: 0001084991 (see all company filings)

IRS No.: 752811855 | Fiscal Year End: 1231
Type: SC 13G/A | Act: 34 | File No.: 005-78868 | Film No.: 12602819
SIC: 1389 Oil & Gas Field Services, NEC