Trying to find early aeronautical charts?

Im wondering where i can find some type of early aeronautical charts that refer to these "amber airway #7 or "blue airway #5" airways for navigation. Im not sure if these where part of civilian or military charts. i've searched so much for them that im afraid google is gonna send me a bill... whichever, they sure are hard to find. I prefer to have some between the mid 30's to maybe late 40's early 50's era (right before VOR came into the picture). I am working on recreating certian fictional/non-fictional flights with FSX involving civilian/military aircraft and i am trying to make it as realistic as possible so any type of extra information about navigation during and right after WWII would also be of help. I know that ADF/NDB and celestial navigation was a option for navigation then but not sure if was the main type to use. anyways, hope to get back some great answers! (by the way, please dont reply explaining how ADF/NDB work or the correct date when VOR came in, just want to know where i can find the charts with those airways and the other nav methods.)