Look what I just found:
Arizona Highways Magazine, online as PDF’s, Back Editions all the way back into the 1920, FOR FREE!!!
This is the whole database
https://azmemory.azlibrary.gov/digital/collection/aho/search
This is the January 1974 edition
https://azmemory.azlibrary.gov/digital/collection/aho/id/524/rec/311
This is the March 1975 edition
https://azmemory.azlibrary.gov/digital/collection/aho/id/751/rec/325
This is so awesome I made it its own post. 