Butler, M. J. A. (1987). Marine resource mapping: An introductory manual. Food and Agriculture Organization of the United Nations.
Chicago-viite (17. p.)Butler, Michael J. A. Marine Resource Mapping: An Introductory Manual. Rome: Food and Agriculture Organization of the United Nations, 1987.
MLA-viite (9. p.)Butler, Michael J. A. Marine Resource Mapping: An Introductory Manual. Food and Agriculture Organization of the United Nations, 1987.
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