This is a very good, 1st thus, copy.  C 1972.  

Review:
"Annie R. Johnson, who was born in Colonia Diaz, a Mormon Colony named after the then President of Mexico, Porfirio Diaz, has done a remarkable job of accumulating this history and anecdotal stories, as well as old photos and family grouping names, from many old family journals and letters. My father was also born in Diaz in 1907, and was thrilled with the copy that I sent to him before his passing. Formerly Diaz was named La Ascension by those native Mexicans living there. I highly recommend this amazing book to anyone interested in the history or genealogy contained therein. Sister Johnson was helped in this endeavor by the Deseret News requesting assistance from families with such records to come forward."

From wiki:
Colonia Díaz was the first permanent Mormon colony in Mexico, located along the Casas Grandes River in the northwest of the state of Chihuahua, Mexico. It is now a ghost town bordered on the east by the Sierra Madre Occidental. It was the nearest colony to the Mexico–United States border. By 1900, Díaz had grown to 623 inhabitants. In 1912, during the Mexican Revolution, Colonia Díaz was intentionally burned and destroyed.