00266nam a2200121Ia 4500100002000000250000600020654001200026245002100038260004400059082002100103300000800124546001200132  aValkenburg/Van   a3  anetwork  aNetwork Analysis  bPrentice Hall of IndiaaNew Delhic1974  a621.385/VALbVAL  a571  aENGLISH