American Automobile Owners Association
Rare separately published map of San Diego and Imperial Counties, published by the American Automobile Owners Association (not AAA).
At one point, AAA and AAOA were involved in copyright litigation over their name similarities.
The map extends to the boundary between California and Arizona, providing a detailed look at the road systems in the region,
The early and quite ambitious street system in the Brawley, Imperial, El Centro area is of note.