Citation
O'Rourke, Mary Kay,Campbell, Carlos C (2001) Environmental risks: dealing with the known and the unknow. Rev Panam Salud Publica;9(3) 135-137,mar. 2001. Retrieved from http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S1020-49892001000300001&lng=en&nrm=iso&tlng=en