CIPA 2003 XIX th International Symposium, 30 September - 04 October, 2003, Antalya, Turkey 
ACKNOWLEDGMENTS 
I wish to thank Roberto Barba for his valuable contribution in 
the first stages of the reconnaissance and record in the city streets, 
and especially to Agustín Ortiz, Cornelius Meyer, Genoveva 
Castro, Sandra Gallegos and Cristóbal Crivelli for their 
participation in the studies in the Plaza de la Conchita square in 
Coyoacán. Deserving special citation are Cedric Panissod and 
Alain Jolivet from the CNRS Geophysics Research Center in 
France who offered their help and expertise for the electrostatic 
resistance studies of Coyoacán’s streets. CONACYT grant 
project No. 400358-5-25054H.