Departhemen of Geography University of Waterloo, 2005
Buku Teks
Aiu Ahra, author
Gramedia Pustaka Utama, 2016
Buku Teks
Aiu Ahra, author
Gramedia Pustaka Utama, 2016
Buku Teks
Clarke, Arthur C.
Harper and Row, 1965
Buku Teks
Volkov, A., author
Foreign Languages Publishing House, [date of publication not identified]
Buku Teks