The AIM changed all the time - the ones out there are generally the last version.
Central Office kept a copy - that's were most of the copies came from. I've seen some books still on the original mylar.
Fisher had Operation Description (OD) sheets. I've seen a page or two - no books are known to have survived - they were much thicker than AIM.
AIM info:
http://www.camaros.org/AIM.shtml