Table:
text: Harvard Crimson football
Head coaching history
Head coaching history
Name_ Years Wins Losses Ties_ Pct_
Lloyd Jordan 1950–1956 24 31 3 .440
John Yovicsin 1957–1970 78 42 5 .644
Joe Restic 1971–1993 117 97 6 .545
Tim Murphy 1994–current 128 61 0 .677

Question: Among Harvard Crimson Football, which Pct has years from 1957–1970 and wins less than 78 ?