Shenk, Wilbert R, Changing frontiers of mission / [print] Wilbert R. Shenk. - Maryknoll, New York : Orbis Books, (c)1999. - xi, 207 pages ; 24 cm. LCCN: 98051055 Subjects--Topical Terms: Missions--Theory.Missions--Theory--History. LC Class. No.: BV2063.S546.C436 1999