HARVARD at Columbia  Pennsylvania at Dartmouth  Princeton at Cornell  Yale at Brown  LAST WEEK  SEASON TO-DATE Jeffrey A. Zucker Sports Editor  Columbia 24-23  Dartmouth 21-13  Princeton 35-3  Brown 16-9  0-0  .000 Mike Knobler Executive Editor  HARVARD 28-7  Dartmouth 20-17  Cornell 21-17  Brown 10-9  0-0  .000 Marie B. Morris Associate Managing Editor  HARVARD 24-3  Pennsylvania 31-28  Cornell 27-23  Brown 14-9  0-0  .000 Nick Wurf Staff Writer  HARVARD 31-10  Pennsylvania 21-20  Princeton 38-27  Brown 35-10  0-0 Brian M. Byrne Crimson Pressman Guest Selector  HARVARD 24-10  Pennsylvania 28-7  Cornell 21-20  Brown 17-13 Ji H. Min Photographic Chairman Guest Selector  HARVARD 35-14  Dartmouth 24-14  Princeton 27-24  Yale 17-14 Marty DomresColumbia '69 Ex-Baltimore Colts quarterback Guest Selector  Columbia 17-14  Pennsylvania 28-21  Princeton 35-21  Brown 21-7