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␈↓β␈↓ ¬_STANFORD, CALIFORNIA 94305␈↓ ↓H
␈↓∧ARTIFICIAL INTELLIGENCE LABORATORY␈↓ 
+   Telephone:␈↓ ↓H
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+415-497-3330␈↓ ↓H
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␈↓↓␈↓ ¬bFebruary 13, 1975␈↓ ↓H
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Professor Charles Brumfiel␈↓ ↓H
Dept. of Mathematics␈↓ ↓H
University of Michigan␈↓ ↓H
Ann Arbor, Michigan 48104␈↓ ↓H
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Dear Professor Brumfiel:␈↓ ↓H
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Arthur L. Samuel␈↓ εW
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