Jacks, Bob creator Jacks, Betty Wormser,  Ron text xx Colorado Springs, Colo NavPress 1987 9999 rev.ed. monographic und eng 156 p ; 21 cm. Bob Jacks, Betty Jacks, Ron Wormser Bible Study and teaching Bible Evangelistic work BV3793 .J33 1987 891091270 9780891091271 200831