Lewis, R. W.
Programming industrial control systems using IEC 1131-3 - Rev. ed. - London IET 2007 - xvi, 329p. - IET control engineering series; no. 50 .
0-85296-950-3
Programming industrial control systems using IEC 1131-3 - Rev. ed. - London IET 2007 - xvi, 329p. - IET control engineering series; no. 50 .
0-85296-950-3