00324nam a2200121Ia 4500082001800000100002000018245004500038260004900083300002000132490004000152500000500192700000500197  a516bSt875.IF  aStoll, Wil-helm  aInvariant forms on grassmann manifoldsb  aNew JerseybPrinceton University Pressc1977  aix, 113p. Index  aAnnals of Mathematics studies v 89  a  a