TWIDALE, C. (1976). Analysis of landforms. John Wiley.
Tohutoru Kātū Chicago (17th ed.)TWIDALE, C.R. Analysis of Landforms. Sydney: John Wiley, 1976.
Tohutoro MLA (9th ed.)TWIDALE, C.R. Analysis of Landforms. John Wiley, 1976.
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