The references in my book are all made with permission of the original authors. For example, I talked personally to Grant Haist and Bruce Kahn and got their approval. In fact, Bruce gave me a CD with his entire outline for his GEH course.

The reference is to CD6. I had forgotten that Grant referenced that. It was planned for RA4 but missed the boat. It was used for Kodachrome.

I will be testing my HA developer with a set of evaporated metal high definition negative and positive images that cost about $500! And a friend of mine has build a micro densitometer! No problem with testing!

So, there you are!