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Standley Systems
2601 N.W. Expressway, Suite 1110W
Oklahoma City, Oklahoma
73112
United States
The WellMark Company
P.O. Box 95459
Oklahoma City, Oklahoma
73143-5459
United States
Technique Data Systems
333 W. Wilshire Blvd., Suite C
Oklahoma City, Oklahoma
73116-7765
United States
The American Society for Mathematics
in Educational Cooperative Organizations
P.O. Box 60434
Oklahoma City, Oklahoma
73127
United States