As others have mentioned, it certainly seems to be a variation of MERDC. This happens to be my favorite, and I tried to duplicate it on my deuce tipper. The very nature of this camo scheme lends itself to interpretation and I bet you will be hard pressed to ever find two exactly the same. Most were brushed on freehanded, and weathering changes the colors.
You are in luck, . . . because the manual you need is ready for download in the Tech Manual Section:
TB 43-0147 COLOR, MARKING AND CAMOUFLAGE PATTERNS USED ON MILITARY EQUIPMENT (4-color MERDC Dec. 1975)
The big black stars on the doors would be incorrect for this camo pattern, but would have small black stars on the front bumper and rear.