3M Company
Aetna Life Insurance Co.
Allegheny Technologies
Alliant Techsystems
American Express Company
Ball Corporation
Basin Electric Power Cooperative
Bayer Corporation
BNSF Railway
Bridgestone Tires
Bristol-Myers Squibb
Campbell Soup Company
Cargill
Conagra Inc.
CSX Transporation
Cummins
CVS Corporation
Dow Chemical Company
E.I. Dupont
Exxon Mobil Corporation
General Electric Company
IBM Corporation
International Paper Company
Kaiser Foundation Hospitals
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Kraft General Foods, Inc.
Lafarge Corporation
Lockheed Martin
Martin Marietta Co.
Massey Coal Company, Inc.
NEC Electronics
Newell-Rubbermaid
Norfolk Southern
Occidental Chemical Corporation
Overnite Transportation
Peabody Coal Company
Pepsico, Inc.
Pillsbury Corporation
Portland General Electric
Ryder System
Southwest Airlines
Temple-Inland
Tyson Foods
Union Pacific Railroad Company
Union Tank Car Company
USX Corporation
Wal-Mart Stores, Inc.
Whirlpool Corporation
Xerox Corporation |
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