TY - JOUR AU - Kaufman, H. TI - Algebraic structure theory of sequential machines, by J. Hartmanis and R. E. Stearns Prentice-Hall, Inc., Englewood Cliffs, N. J., 1966. viii + 211 pages . $11.50. JO - Canadian mathematical bulletin PY - 1968 SP - 324 EP - 324 VL - 11 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0008439500029179/ DO - 10.1017/S0008439500029179 ID - 10_1017_S0008439500029179 ER -