The Lanny Wolfe Songs for Trios Vol. 2 SSA SAB with Piano by W. Elmo Mercer Songbook is a vintage and antique sheet music book featuring Christian and Gospel songs suitable for trio ensembles. Published by The Benson Company in the United States, this songbook offers a collection of songs for vocal trios with piano accompaniment. Perfect for musicians looking to sing in harmony in the SSA/SAB ensemble, this songbook is a valuable resource for those who appreciate classic Christian music.