Geology

PEDERSEN, P.

Kjobenhavn, Bianco Luno, 1853.

SCHOUW, J. F.

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JOHNSTRUP, F.

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STAHL, ALFRED u. ARTUR EBERT.

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Leipzig, Wilhelm Engelmann, 1871.

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SAUNDERS, ROBERT.

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WEIDICK, ANKER.

Copenhagen, 1968.

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Hafniae, 1952.

MIKKELSEN, VALDEMAR M.

Copenhagen, 1949.

LUCIUS, M.

Luxemburg, 1937.