Heffer, D. E. Basic principles and practice of microprocessors / D.E. Heffer, G .A. King, and D.C. Keith. - 2nd ed. - London ; Baltimore, Md., U.S.A. : E. Arnold, 1986. - xi, 241 p. : ill. ; 25 cm. Includes index. ISBN: 0713135697 (pbk.) LCCN: 87-179831 Subjects--Topical Terms: Microprocessors. Dewey Class. No.: 004.16 HEF