00294nam a2200109Ia 450000500170000000800410001708200140005810000190007224500430009126000420013430000080017620260224041035.0260224s9999||||xx |||||||||||||| ||und||  a517.8 SPI  aSpiegel, M.R.  0aTheory & problems of complex variables  aNew York: Mc-Graw-Hill Book Co.c1974  a313