00307nam a2200121Ia 4500082001700000100002700017245002900044260003400073300001300107490005500120500000500175700000500180  a512bV331.RD  aVasconcelos, Wolmer V.  aRings of dimension twob  aNew YorkbMarcel Dekkerc1976  ax, 101p.  aLecture notes in Pure and Applied Mathematicsv 22  a  a