Coal resources of Oregon,
Mason, Ralph S.
Coal resources of Oregon, by Ralph S. Mason and Margaret I. Erwin. Prepared in cooperation with the Oregon Dept. of Geology and Mineral Industries. - Washington, 1955. - ii, 7 p. maps (part fold.) 27 cm.
Bibliography: p. 6-7.
gs 55000283
Coal mines and mining--Oregon.
QE75 / .C5 no. 362
I 19.4/2:362
Coal resources of Oregon, by Ralph S. Mason and Margaret I. Erwin. Prepared in cooperation with the Oregon Dept. of Geology and Mineral Industries. - Washington, 1955. - ii, 7 p. maps (part fold.) 27 cm.
Bibliography: p. 6-7.
gs 55000283
Coal mines and mining--Oregon.
QE75 / .C5 no. 362
I 19.4/2:362