000			00313nam a2200121Ia 4500
008			190428s9999||||xx |||||||||||||| ||und||
020			_a0-87692-156-10
100			_aValkenburg, M.E.V. _912938
245			_aNetwork analysis
250			_aThird
250			_b1989. xv-571
260			_bPrentice-Hall. New Delhi, India
999			_c12780 _d12780