Jayasena, A. I. (1977). Changes in the population distribution of Ceylon and regional economic development, 1911-1953. Submitted to the Graduate School, University of the Philippines ... for the degree of Mater of Science in Geography [microform]. Photoduplication Service. University of the Philippines Library.
Lua i Stíl Chicago (17ú heag.)Jayasena, Amara Indrani. Changes in the Population Distribution of Ceylon and Regional Economic Development, 1911-1953. Submitted to the Graduate School, University of the Philippines ... for the Degree of Mater of Science in Geography [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
Lua MLA (9ú heag.)Jayasena, Amara Indrani. Changes in the Population Distribution of Ceylon and Regional Economic Development, 1911-1953. Submitted to the Graduate School, University of the Philippines ... for the Degree of Mater of Science in Geography [microform]. Photoduplication Service. University of the Philippines Library, 1977.