Programmable logic controllers :
Webb, John W.
Programmable logic controllers : principles and applications / John W. Webb, Ronald A. Reis. - 4th ed. - Upper Saddle River, N.J. : Prentice Hall, c1999. - xv, 443 p. : ill. ; 24 cm.
Includes bibliographical references (p. 435-437) and index.
0136794084
Programmable controllers.
Programmable logic controllers : principles and applications / John W. Webb, Ronald A. Reis. - 4th ed. - Upper Saddle River, N.J. : Prentice Hall, c1999. - xv, 443 p. : ill. ; 24 cm.
Includes bibliographical references (p. 435-437) and index.
0136794084
Programmable controllers.