Rapello, Ralph G., 1930- Essentials of numerical control / Ralph G. Rapello. - Englewood Cliffs, NJ : Prentice-Hall, c1986. - xi, 244 p. : ill. ISBN: 0132865688 : $26.95 Subjects--Topical Terms: Machine-tools--Numerical control. LC Class. No.: TJ1189 / .R28 1986 Dewey Class. No.: 621.9/023�19