SCOTT, R. C. (1989). Physical Geography Ralp C. Scott. West Pub.
Lua i Stíl Chicago (17ú heag.)SCOTT, Ralph C. Physical Geography Ralp C. Scott. West Pub, 1989.
Lua MLA (8ú heag.)SCOTT, Ralph C. Physical Geography Ralp C. Scott. West Pub, 1989.
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