Zoology

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Seattle, 1962.

REBAU, HEINRICH.

Stuttgart, Weise & Stoppani, 1841.

ESCHRICHT, DAN. FREDR.

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HICKIN, NORMAN E.

London, Hutchinson, (1965).

KIELSEN, FREDERIK CHRISTIAN.

Hafniae (Copenhagen), C. Steen, 1835.

KAALAAS, B.

Trondhjem, Aktietrykkeriet, 1911.

FORD, E. B.

London, Collins, 1955.

ESCHRICHT, DAN. FREDR.

Kbhvn., 1838.

MEINERT, FR.

Copenhagen, 1886.

HANSEN, KAI (EDIT.).

Copenhagen, 1953.

RAU, GUSTAV.

Stuttgart, Schückhart & Ebner, 1913.

STONE, ALLAN et al. (EDT.).

Washington, 1965.

JONSTONUS, JOHANNES - JOHN JONSTON - JOHNSTONE.

Amstelodami (Amsterdam), Johannes Jacobi Schipperi, 1657.

THINGVALLAVATN -

Odense, 1992.

STROMER v. REICHENBACH, ERNST.

Leipzig u. Berlin, 1912.

KJØLBYE, C.S.

Kbhvn., 1821.

HOLMGREN, NILS.

Uppsal & Stockh., 1909-13.

HARDY, ALISTER.

London, 1959.