Hi jimpy,
thanks again for all the scans you've been doing.
Alan Class used a lot of Atlas books which almost always had job numbers at the start.
Now, the way I confirmed the Black Magic book was I went to GCD at this link:
http://www.comics.org/I looked the name of a uniquely named story under SEARCH and selected 'Story Title' and confirmed the first half of your scan were indeed from a Prize comic and which original issue.
I then checked a story title that wasn't listed in the original Prize issue and turned up that the rest of the book contained a few stories from an Atlas Astonishing and Mystic Comics.
Marvel/Atlas/Timely and DC/National Comics are the two most common publishers we can NOT allow on the site.
There's a more complete list of which publishers are safe and not safe in the 'What you can upload' section.
In your Black Magic case the majority of the book was safe for DCM, only the second half wasn't good.
If you need more help you can contact me via a Private Message.
Take care,
-Yoc