21 Foundation Studies for Alto and Bass Clarinet compiled and edited by William E. Rhoads. Etudes taken from the works of Lee, Dotzauer, Buchler, Platti, Schroder, Merck, Kummer, Franchomme, and Duport (several of these have been identified as composers of cello etudes). Keys from 4 flats to 2 sharps. Conservative range