The main collection of treatises and other secondary sources on Mexican law is KGF 100 to KGF 9900. Use TALLONS to find more sources anywhere in the Law Library.
An excellent starting point for research in Spanish is the Enciclopedia Jurídica Mexicana KGF 100 E52 2002.
The Index to Foreign Legal Periodicals covers 6 leading law reviews from Mexico.
Leading Mexican law reviews:
The Biblioteca Jurídica Virtual is a project of the UNAM Instituto de Investigaciones Jurídicas. It has full text PDF in Spanish of 13 law reviews from Mexico and also of several hundred monographs on Mexican law.
Use TALLONS to find English-language discussions of Mexican law in books.
Use LegalTrac and Index to Legal Periodicals to find U.S. law review articles on Mexican law.
In general, more English-language discussion of Mexican law is found in law reviews than in books.