000			00315nam a2200121Ia 4500
008			191206s9999 xx 000 0 und d
020			_a63853205
245		0	_aBasic systems analysis
260			_aCanfield Press
260			_cc[1971]
300			_a"x, 260 p. illus., forms. 25 cm."
999			_c15527 _d15527