Rare signed programme.
'In 1967, Chung and Pinchas Zukerman were the joint winners of the Edgar Leventritt Competition, the first time for such an outcome in the history of the competition. This prize led to several engagements in North America, such as with the Chicago Symphony Orchestra and the New York Philharmonic. She substituted for Nathan Milstein for his White House Gala when he became indisposed.
Her next big opportunity came in 1970 as a substitute for Itzhak Perlman, with the London Symphony Orchestra....' - Source = Wikipedia
Full details regarding Kyung-Wha Chung are available on Wikipedia -
https://en.wikipedia.org/wiki/Kyung_Wha_Chung