94 SOCIAL SQIWI 1ST tions can also stimulate activity which can generate pride in an cxten" sive use of the mother tongue by the minority language speakers. S G BHATIA 1 John ^lacnamara. Bilingualism and Primary Education, Edinburgh University Press, 1966. s Department of Education, Manila, "The relative effectiveness of the vernacular and of English as media of instruction". Bureau of Public Schools, Manila^ Bulletin Nos 9,12,14,16, 1953. 6 International Institute of Teachers* College, Columbia, "A survey of the public educational system of Puerto Rico", Bureau of Publications, N Y, 1926. 4 Macnamara, op cit. 8 WE Lambert, J Havelka, R C Gardner, "Linguistic Manifestations of Bilingu" alism", Amerian Journal of Psychology, Vol 72-1959. 6 Paul A Kolers, "Reading and Talking Bilingually^, American Journal of Psychology, Vol 79,1966. 7 James Cummins/'The Influence of Bilingualism on Cognitive Growth: A Synthesis of Research Findings and Explanatory Hypotheses^, Marking Papers in Bilingu^ ^ aftsm. No 9, Atrt-il, 1976. s WE Lambert) ^Culture and language as factors in learning and education," Emulation of Immigrant Students, A Wolfgang (cd), Ontario Institute for Studies in Education, Toronto, 1975. 9 Cummins, op cit. 10 Brucc A Gaarder, "Organization of a Bilingual School", Journal of Social Issues X;XIII, No 2, April, 1967.