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3. Survey of tar, hydrocarbons and metal pollution in the coastal waters of Oman;Burns;Mar. Pollut. Bull.,1982
4. Directiva 76/769/CE;DOCE;Diario Oficial de las Comunidades Europeas, (DOCE),1976
5. Directiva 85/467/CE;DOCE;Diario Oficial de las Comunidates Europeas, (DOCE),1985