Essential elements for choir : mixed voices level 4/ Hal Leonard Corporation - N. Y. : Glencoe/McGraw-Hill, c2002. - vi, 202 pages : illustration ; 27 cm. ISBN: 0-07-826057-4. Subjects--Topical Terms: 1. Choirs (Music).2. Choral music.3. Music-Instruction and study. Dewey Class. No.: Circ. 782.5 Es78 2002