Book Review: Missionaries to Yourselves: African Catechists Today. Edited by Aylward Shorter and Eugene Kataza. Geoffrey Chapman, 1972. x+212 pp. £2.50.; Christ and the Younger Churches. Edited by Georg F. Vicedom. SPCK, 1972. 112 pp. £1.40 - Leake, John (Theology, 1972)