Geology

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Hafniae, 1952.

MIKKELSEN, VALDEMAR M.

Copenhagen, 1949.

LUCIUS, M.

Luxemburg, 1937.

FORBES, CHARLES S.

London, John Murray, 1860.

WEIDICK, ANKER.

Copenhagen, 1968.

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SCORESBY, WILLIAM.

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RICHTHOFEN, FERDINAND von.

Berlin, Robert Oppenheim, 1886.