Hollis, Helen R. 1977. Musical Instruments of Joseph Haydn: An Introduction. Smithsonian Studies in History and Technology, 38: 1-33. doi:10.5479/si.00810258.38.1
Musical instruments of the baroque and early classical eras [Slide] / Division of Musical Instruments, National Museum of History and Technology ; prepared by Helen R. Hollis with assistance from James M. Weaver