I've been perusing NOAA's archive web site and found some pretty cool old aeronautical charts. They are charts of the old airway routes (see the giant concrete arrow thread. http://www.backcountrypilot.org/forum/g ... 55#p175653)
Here are a few samples of the charts they have...
Los Angeles CA to Las Vegas NV
http://historicalcharts.noaa.gov/histor ... 32-00-1931
Las Vegas NV to Milford UT
http://historicalcharts.noaa.gov/histor ... 33-11-1930
Milford UT to SLC UT
http://historicalcharts.noaa.gov/histor ... 34-00-1929
You can check at all the airway charts by going to http://historicalcharts.noaa.gov/histor ... attributes
Then put "airway map" in the title field, select Aeronautical Chart for type, and then select "Any State" Leave the rest blank and then click on search.