BIBCYT http://bibcyt.ucla.edu.ve/cgi-win/be_alex.exe?Ultimo&Nombrebd=BIBCYT UCLA - Biblioteca de Ciencias y Tecnologia Felix Morales Bueno Lockwood, J. R. P Principal Small, Mitchell J. P Principal Schervish, Mark J. P Principal Patrick L., Gurian P Principal Analysis of Contaminant Co-Occurrence in Community Water Systems Vol: 99 pp.45 - 56