1. Microbiological groundwater quality and health indicators in Mexico City

   • Marisa Mazari-Hiriart
   • Enrique Cifuentes
   • Juan J. Calva

   OriginalPaper Pages: 91 - 103

2. Urban forest cover of the Chicago region and its relation to household density and income

   • Louis R. Iverson
   • Elizabeth A. Cook

   OriginalPaper Pages: 105 - 124

3. Sources, sinks, and fluxes of nutrients (N + P) in a small highly modified urban estuary in southern California

   • Dr. Peggy Fong
   • Dr. Joy B. Zedler

   OriginalPaper Pages: 125 - 144

4. On the environmental role of urban lakes in Mexico City

   • Amparo Martínez-Arroyo
   • Ernesto Jáuregui

   OriginalPaper Pages: 145 - 166