Nicholson, J. G. W. J. a. F. Ice in fisheries. FAO.
Lua i Stíl Chicago (17ú heag.)Nicholson, J. Graham W.A. Johnston and F.S. Ice in Fisheries. FAO.
Lua MLA (8ú heag.)Nicholson, J. Graham W.A. Johnston and F.S. Ice in Fisheries. FAO.
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