Form SC 13G - Statement of Beneficial Ownership by Certain Investors:
SEC Accession No. 0000932471-13-004723
Filing Date
2013-02-13
Accepted
2013-02-13 12:07:21
Documents
1

Document Format Files

Seq Description Document Type Size
1 mduresourcesgroup.htm SC 13G 50257
  Complete submission text file 0000932471-13-004723.txt   51845
Mailing Address 1200 WEST CENTURY AVENUE BISMARCK ND 58503
Business Address 1200 WEST CENTURY AVENUE BISMARCK ND 58503 701-530-1059
MDU RESOURCES GROUP INC (Subject) CIK: 0000067716 (see all company filings)

EIN.: 410423660 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G | Act: 34 | File No.: 005-35797 | Film No.: 13601130
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)

Mailing Address PO BOX 2600 V26 VALLEY FORGE PA 19482-2600
Business Address PO BOX 2600 V26 VALLEY FORGE PA 19482-2600 6106691000
VANGUARD GROUP INC (Filed by) CIK: 0000102909 (see all company filings)

EIN.: 231945930 | State of Incorp.: PA | Fiscal Year End: 1231
Type: SC 13G