Grubb, Norman P. 1895-1993. Touching the invisible / Norman Grubb. - Fort Washington, Pa. : Christian Literature Crusade, 1940, 1973 printing. - 64 p. ; 18 cm. Subjects--Topical Terms: Christian life.Faith.Church group work. LC Class. No.: BV4501 / .G7 1940 Dewey Class. No.: 248 / G885T