Cobbe, James The economics of interactive instruction : the case of South Africa / James Cobbe - Washington, D.C. : LearnTech, c1995. - 30p. ; ill. ; 23 cm. - LearnTech case study series no. 7 . Includes index. ISBN: LCCN: Subjects--Topical Terms: EconomicsEconomicsInteractive instruction LC Class. No.: C653e / . 1995