Vol. 5 No. 1 (1970)

Articles

• Origin of Lake Singkarak in the Padang Highlands (Central Sumatra)

  M.T. Zen

  1-8

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• Penentuan Penggunaan Tanah Pertanian dengan Programming Linier Antardaerah

  Budhy Tjahyati Sugijanto

  9-11

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