Choral connections : level 1, mixed v / [senior author, Mollie G. Tower ; Marc Erck, Ruth Phillips, Linda S. Wyatt ; consulting author, Susan Snyder]. - New York : Glencoe/McGraw-Hill, 1997. - 248 p. : ill. ; 28 cm. ISBN: 0-02-655527-1 0-02-655536-0 Subjects--Topical Terms: Choral singing--Instruction and study.