Yazar
Donald Cave Duncan
4 cilt bulundu.
Cilt sonuçları
Geology and coal deposits in part of the Coos Bay coal field, Oregon
Donald Cave Duncan · U.S. G.P.O.
73 sayfa · 1953
Coal / Coal mines and mining / Coal reserves / Economic Geology / Geology
Oil shale
Donald Cave Duncan · U.S. Dept. of the Interior, Geological Survey
15 sayfa · 1980
Environmental aspects / Environmental aspects of Oil-shale industry / Oil-shale industry / Oil-shales