Mexican Census

I hope somebody can answer this for me. I remember that, a long time ago, on the Yahoo Ranchos group, I downloaded a file that had the results of the INEGI Mexican census for the states of Aguascalientes, Jalisco, and Zacatecas. Later on, I think it was on Jonathan Walker's cd, I saw the complete review for all the states. It included the reported population on every single municipio and every single city, town and rancho in the whole country. Does anybody know where can I find this file? It was in Adobe format.

The reason I need it, is because I started volunteering in the 1930 mexican census project. I am currently indexing pages for the state of Chihuahua, and some of the localities are hard to read, so I thought that by looking at the current census listings, I could descipher the name I am looking for.

Hope somebody helps me with this.

Saludos,

Steve.