00437nam a2200145 a 4500008004100000100001700041245008900058260003400147300003300181650002300214650002700237003000100264005001700265040000900282                                          aVerma, S. N.  aAutomatic control systems :ba textbook for engineering students /cby S. N. Verma.   aDelhi :b Khanna pub.,c1992.  aii, 559 p. :bill. ;c22 cm.  aAutomatic control.  aRelay control systems.20230123133626.0  cNUST