By Cole Donald C.   Carpio Fernando   León Ninfa   in Revista Panamericana de Salud Pública/Pan American Journal of Public Health

ISSN:1020-4989|8|3|196-201

Pan American Health Organization (PAHO)‎(2000)‎

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By Cole Donald C.   Carpio Fernando   Julian Jim   Leon Ninfa   in Journal of Toxicology and Environmental Health

ISSN:1087-2620|55|2|77-91

Taylor & Francis Ltd‎(1998)‎

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