(1994). The usborne illustrated encylopedia: The Natural world. London: Friends of the Earth International.
Chicago Stili AlıntıThe Usborne Illustrated Encylopedia: The Natural World. London: Friends of the Earth International, 1994.
MLA AlıntıThe Usborne Illustrated Encylopedia: The Natural World. London: Friends of the Earth International, 1994.
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