Briggs, D. J., & Smithson, P. (1995). Fundamentals of physical geography. Routledge.
Lua i Stíl Chicago (17ú heag.)Briggs, David J., agus Peter Smithson. Fundamentals of Physical Geography. London: Routledge, 1995.
Lua MLA (9ú heag.)Briggs, David J., agus Peter Smithson. Fundamentals of Physical Geography. Routledge, 1995.
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