Gaya APA

North Sumatera Geochemical and Mineral Exploration Project ; 1984 Index of Northern Sumatera Geological and Geochemical Maps, and Northern Sumatera Bibliography. (). Bandung, Jawa Barat, Indonesia: Pusat Vulkanologi dan Mitigasi Bencana Geologi.

Gaya MLA

North Sumatera Geochemical and Mineral Exploration Project ; 1984 Index of Northern Sumatera Geological and Geochemical Maps, and Northern Sumatera Bibliography. . Bandung, Jawa Barat, Indonesia: Pusat Vulkanologi dan Mitigasi Bencana Geologi, . .