Okaaaaay....

The only useful Google result was the previous one.

Wiki had never heard of 'this influential catalogue'...

After using several esoteric search engines, including ones specialised for Business searches,

http://au.search.yahoo.com/search?p=An%27R+catalogue&ei=utf-8&fr=b2ie7

has a couple of artists claiming to be in that catalogue

and AMMA is mentioned...

:-) Well hidden though ...