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Howells, M. F.

Ordovician ash-flow tuffs in eastern Snowdonia / M. F. Howells, B. E. Leveridge and C. D. R. Evans. - London: Her Majesty's Stationery Office, 1973. - iv, 33 p. : ill., maps, tables ; 30 cm. - Institute of Geological Sciences : Natural Environment Research Council. 73/3 .

Includes bibliographical references (p. 33).

ISBN: 0118806033

Subjects--Topical Terms:
Ash--Snowdonia (Wales)

Dewey Class. No.: 551.73142925