This single piece of paper constitutes the entirety of the understanding between TSR and the authors of the 1975 Greyhawk supplement: most significantly, it covers a copyright assignment to TSR and an agreement from TSR to pay royalties based on "the cover price of the game rules or game on each and every copy sold." It is quite short, having been drafted pro bono by Gary Gygax's uncle at a time when Tactical Studies Rules was still a partnership, and D&D had sold perhaps 1500 copies. This l...
