Presumably you're talking about Original D&D - that's as far back as can be gone. Original D&D can be had from RPGNow or DrivethruRPG for .
It doesn't, or shouldn't, matter when this may have appeared in some TSR document. What matters is where it appeared to gamers, and that "where" is in incredibly easy-to-access sources. THat they don't have them, refuse to use them, or whatever that's just...man, I just don't know.
Look, you want to rant about stupid stuff? Fine, I'll give you one.
The article asks people to write them if they know of an earlier reference. Have you found an earlier reference and written them?
The article says they do not have a COMPLETE set going back to the 70s. Do you have a COMPLETE set going back to the 70s (and I do not mean just some common ODD stuff, I mean a COMPLETE set, all variations, all volume numbers, etc.)?
Do you know ANYONE who has a truly COMPLETE set?
It's not an "incredibly easy-to-access source". It's not that they "refuse to use them". It's that they did use them, came up with an answer, and they do not have a 100% complete set back to the 70s. You have taken that information, changed the information to suit your personal rant, and then proceeded to rant about that strawman for a few posts now.
So, it's time to back your rant up. Have you found an earlier source, which you claimed was incredibly easy to access? If so, have you written them? If a complete set going back to the 70s is easily found, then do you have it? And again, I do not mean do you have most of it, I mean do you have ALL of it?
If not, then why do you feel it is OK to hold other people to a standard you will not hold yourself to?