I have the first one you link to, but was talking about the three book set: https://en.m.wikipedia.org/wiki/Dungeons_%26_Dragons_(1974) https://en.m.wikipedia.

I have the first one you link to, but was talking about the three book set: https://en.m.wikipedia.org/wiki/Dungeons_%26_Dragons_(1974) https://en.m.wikipedia.org/wiki/Dungeons_%26_Dragons_(1974) Which semantically isn't a dm's guide, but also is because it has everything in it. AD&D is sort of 1.0. Anything before that is 0.