Levels of polycyclic aromatic hydrocarbons, polychlorinated byphenyls, methylmercury and butyltins in the natural UNESCO reserve of the biosphere of Urdaibai (Bay of Biscay, Spain)

1. Bustamante, J.
2. Albisu, A.
3. Bartolomé, L.
4. Prieto, A.
5. Atutxa, A.
6. Arrasate, S.
7. Anakabe, E.
8. de Diego, A.
9. Usobiaga, A.
10. Zuloaga, O.