Form SC 13G - Statement of Beneficial Ownership by Certain Investors:
SEC Accession No. 0000354204-11-001312
Filing Date
2011-02-11
Accepted
2011-02-11 14:23:12
Documents
1

Document Format Files

Seq Description Document Type Size
1 SCHEDULE 13G rrd635.htm SC 13G 50169
  Complete submission text file 0000354204-11-001312.txt   52156
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)

EIN.: 222370029 | Fiscal Year End: 1231
Type: SC 13G
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)

EIN.: 752811855 | Fiscal Year End: 1231
Type: SC 13G | Act: 34 | File No.: 005-78868 | Film No.: 11597990
SIC: 1389 Oil & Gas Field Services, NEC