000			00244nam a2200097Ia 4500
008			230915s9999 xx 000 0 und d
050			_aQA 612.3 .H37 2002
100			_aHARPER, JOHN R.
245		0	_aSECONDARY COHOMOLOGY OPERATIONS
942			_cBK
999			_c187655 _d187655