I'm sure some of you guys know about this already.....
The lovely folk at barking frogs permaculture have put the full transcription of a 1981 Bill Mollison PDC online for free download. All 155 pages of it.
http://www.barkingfrogspermaculture.org ... ations.htm
Not out of date at all.
I feel like I've found the lost chord!
All the best,