Introd. by John F. Ross. introd. by John C. Gerber. edited by John Cross. Introd. by Harry C. Carver. Introd. by Roger G. Newton. Introd. by Leon Edel. introd. by Trygve Lie. Introd. by Mark Van Doren. [Introd. by Alice H. Hogan] [Introd. by Neil H. Fisher]