Report of the eighteenth session, Great Britain, 1948.

Report of the eighteenth session, Great Britain, 1948. - London, 1950-<52 > - v. <1-13, 15 > illus., plates, maps. 25 cm.

Includes "References."

gs 50000193


Geology--Congresses.

QE1 / .I6 1948c

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