…THE Summer Daily Vol LXXXIII, No. 63-S Ann Arbor, Michigan-Thursday, August 16, 1973 Ten Cents Twelve Pages ADAMANT ON TAPES: Nixon repeats denials of Watergate charges WASHINGTON ( - President Nixon appealed to the American people last night to end "a backward looking obsession" with the Water- gate scandal and "get on with the urgent business of our nation." Denying again advance knowl- edge of the bugging or participation in the subsquent...…