Boehm, R. G. (1995). Glencoe world geography: A physical and cultural approach (4th ed.). Glencoe.
Chicago-viite (17. p.)Boehm, Richard G. Glencoe World Geography: A Physical and Cultural Approach. 4th ed. New York: Glencoe, 1995.
MLA-viite (8. p.)Boehm, Richard G. Glencoe World Geography: A Physical and Cultural Approach. 4th ed. Glencoe, 1995.
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