00428nam a2200145 a 450000500170000002000150001708200190003210000220005124500630007325000110013626000360014730000200018349000570020370000220026020251203092001.0  a0071006796  a515.9,bD, chu  aChurchill, Ruel V  aComplex variables and applications, Ruel V. Churchill, eng  a5th ed  aNew York, McGraw-Hill, USc1990  axvi,361p.c22cm  aInternational series in pure and applied mathematics  aBrown Ward, James