POTTER, A. (1975). Geology / A.w.r. Potter. M&E.
Lua i Stíl Chicago (17ú heag.)POTTER, A.W.R. Geology / A.w.r. Potter. M&E, 1975.
Lua MLA (8ú heag.)POTTER, A.W.R. Geology / A.w.r. Potter. M&E, 1975.
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