00515nam a2200157Ia 4500020001500000082001700015100002400032245008100056260003600137300001400173490005400187500005500241500000500296700002100301700003500322  a0821801686  a516bIn61.SD  aInternational Press  aConference on Geometry and topology, Harvard University, April 27-29, 1990b  aLehighbLehigh Universityc1991  aiv, 310p.  aSurveys in Differential Geometry v Vol. 1 (1991)  aSupplement to the Journal of Differential Geometry  a  aYau, S. T. ; ed.  aLawson, H. Blaine Jr.; jt. ed.