Instruments of the World - Matica Circus Fire Music Connecticut
Instrument Hide and Seek at the Circus! Interactive Music Game for Google Slides
1920 Pneumatic Circus Calliope - YouTube
1946 TOY AD MUSIC INSTRUMENT CALLIOPE CIRCUS TEE GEE METAL ELECTRIC CARNIVALTC85 | eBay
The Big Top Calliope - Hammacher Schlemmer
John P Hicks, C. E. Duble, K.L. King, B.Withrow, Fred Jewell, W.P. English, Fred Huffer, H.A. Vandercook, C.L. Barnhouse, Russell Alexander, The New England Conservatory Circus Band - A Tribute to Merle