Bell, W. J. (1975). Tuba warm-ups and daily routine: For all tubas, trombones and baritones ; from the William J. Bell complete tuba method. Colin.

Bell, William J. Tuba Warm-ups and Daily Routine: For All Tubas, Trombones and Baritones ; from the William J. Bell Complete Tuba Method. New York, NY: Colin, 1975.

Bell, William J. Tuba Warm-ups and Daily Routine: For All Tubas, Trombones and Baritones ; from the William J. Bell Complete Tuba Method. Colin, 1975.