Joan Peyser wrote a biography of a French composer who was born in what year?
Joan Peyser Joan Peyser (June 12, 1930 – April 24, 2011) was an American musicologist and writer, particularly known for her writing on 20th-century music and for her biographies of George Gershwin, Pierre Boulez and Leonard Bernstein. Her biography of Bernstein was, according to Leon Botstein, the first attempt at a critical account of his life and work.
Roberto Gerhard Robert Gerhard i Ottenwaelder (] ; 25 September 1896 – 5 January 1970) was a Spanish Catalan composer and musical scholar and writer, generally known outside Catalonia as Roberto Gerhard.