00350nam a2200145Ia 450000500170000000800410001702000180005808200210007610000250009724500210012225000120014326000250015530000120018065000120019220250404110552.0231217s9999    xx            000 0 und d  a9788120301566  a621.3192  VAL;89  aValkenburg, Van M E. 0aNetwork analysis  a3rd ed.  c2010bPHIaNew Delhi  axv, 571  aNetwork