Geology

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KUMM, AUGUST.

Bremen-Horn, 1952.

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Hamburg, 1949.

NEUMAYR, MELCHIOR.

Leipzig, Bibliographsichen Instituts, 1887.

CARSTENS, C.W.

Trondhjem, Aktietrykkeriet, 1920.

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HETTNER, ALFRED.

Gotha, Julius Perthes, 1892.

GRIPP, KARL.

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MEUNIER, STANISLAS.

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(REALE ACCADEMIA DELLE SCIENZE DELL' ISTITUTO BOLOGNA) -

Bologna, Annesio Nobili, 1817-19.

READ, H.H. a. JANET WATSON.

N.Y., 1969.

FOGH, C.

København, Philipsen, 1874.

DORN, PAUL.

Stuttgart, 1951.