1889-1964 1900- 1945-1955 20thcentury aaron chineseliterature composers copland correspondence foreignrelations his017000his037000his037070his054000 history historyandcriticism humanrights india jawaharlal music peace peace-building pingbo politicalandsocialviewsnehru politicalandsocialviewspandit politicalaspects unitedstates vijayalakshmi worldpolitics yu 俞平伯