Hello, Mr. Newbie:
I found ordering Microfiche from the BA-MA simpler and cheaper than ordering film from Britain. The ´full list needed´ is given by Mr. Andreas Brekkan on his older (?) website:
http://www.stormbirds.com/eagles/
I have the ´whole set´ now (both Operational units and Schools) on Microfiche and I also bought ´a used´ reader from surplus store so I do not have to got an public Library to read them. In your original quest you ask if this is the source from most or not all researchers are working, I belive most do, but in many cases numbers and codes become garbled when the data is processed into books.
I will quit now, Hope this will help also..
ed