Harrison, P. (1983). Seabirds: An identification guide. Croom Helm.
Chicago Style (17th ed.) CitationHarrison, Peter. Seabirds: An Identification Guide. Kent, England, United Kingdom: Croom Helm, 1983.
MLA (9th ed.) CitationHarrison, Peter. Seabirds: An Identification Guide. Croom Helm, 1983.
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