Melva Wilson  Costen is Helmar Emil  Nielsen Professor Emeritus  of Worship and Music at  the Interdenominational  Theological Center in  Atlanta, Georgia, where she  taught for thirty-two years.  She chaired the committee  that developed The  Presbyterian Hymnal:  Hymns, Psalms and Spiritual  Songs and served on  the Advisory Committee for  the African American  Heritage Hymnal. She is  the author of several  books.