Olson, C. Gordon What in the world is God doing? : the essentials of global missions : an introductory guide/ by C. Gordon Olson - 5th ed. - Cedar Knolls: Global Gospel Pub., 1989. - 310 p. ill. ISBN: 9780962485053 Subjects--Topical Terms: MissionsMissions--Study and teaching LC Class. No.: BV2063.O47 1989