000			00361nam a2200157 4500
008			160616s1964 000 0
245			_aLectures on invariant subspaces
100			_aHelson, Henry
260			_aNew York
260			_bAcademic Press
260			_c1964
300			_a130
500			_aB313N K4
942			_cBK _2BK4751
080			_a513.882 HEL
999			_c4751 _d4751