00353nam a2200121Ia 4500082001700000100004600017245005400063260002900117300001400146490003400160500000500194700003200199  a514bG855.RH  aGriffiths, Phillip A. and Morgan, John W.  aRational homotopy theory and differential formsb  aBostonbBirkhauserc1981  axi, 242p.  aProgress in Mathematics v 16  a  aMorgan, John W. ; jt. auth.