Watch List notes:

Rulau, Russell, Standard catalog of Mexican coins, Paper money, Stocks, Bonds, and Medals / El catáogo de moneda de México, papel moneda, acciones, Krause Publications, Iola, 1981, First edition, 352 pages, softcover. Although this catalog has been on the market for quite a while, the information is still quite relevant. The prices are a bit dated but the information is from noted authorities in Mexico. There are several timeless references and this is good basic one and it will continue to be just that.

Estimate: 20-30 USD