This is a large field of interest for the Mexico collector. For now, all we can offer are a few pointers to more information.
Books concerning cancellations on stamps of Mexico:
- Joseph Schatzkes: The Cancellations of Mexico 1856-1874
- Karl H. Schimmer: The Postmarks of Mexico 1874-1900
- Otto Yag and John K. Bash: The Pre-Stamp Postal Markings of Mexico