Heppell, D. (1976). Type Specimens of invertebrates, excluding insects, held at the Royal Scottish Museum, Edinburgh.
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Chicago Style (17th ed.) Zitazioa
Heppell, David. Type Specimens of Invertebrates, Excluding Insects, Held at the Royal Scottish Museum, Edinburgh. 1976.
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MLA (9th ed.) Zitazioa
Heppell, David. Type Specimens of Invertebrates, Excluding Insects, Held at the Royal Scottish Museum, Edinburgh. 1976.
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Kontuz: berrikusi erreferentzia hauek erabili aurretik.