Waterman, D. A, An overview of pattern-directed inference systems / D.A. Waterman and Frederick Hayes-Roth - iii, 53 pages ; 28 cm. - The Rand paper series; P-6193 . - The Rand paper series; P-6193 . Includes bibliographical references (pages 32-53) Subjects--Topical Terms: Inference--Mathematical models Cybernetics