1Charles Harem: Way Down Upon the Yangtse River;Or,American Music in the People's Republic of China, Institute for Studies in American Music Newsletter, Conservatory of Music Brooklyn Col- lege of the City University of New York, Vol.XVIII Number2:May 1989.
2W.L. Hubbard: The American History and Ency- clopedia of Music viii: History of American Music, 1908.
3Zachary Woolfe: Charles Hamm, Author on Anvericon Popular Music, Dies at 86.New York Times 0ct.23, 2011.
