The 1970 & 1972 Cliff Cross maps found in his 1970-1973 guidebooks:
For the 1974 edition, the new Baja Highway was drawn in over the earlier maps, but not completely accurate. The covers of 5 editions of this very popular book follow these 50+ maps. To zoom in close, press Ctrl (Control) and + (or roll the scroll wheel).
The Cliff Cross Baja Guidebooks (1970-1974):