Funny you should mention this...  I've recently 'discovered' Amazing Heroes and Comics Interview.  The latter is also comic sized -- and terrific.  It's surprising how cheap a lot of these issues are.

I've used mile high and atomic comics to identify contents.   These magazines would sell their back issues on an ongoing basis in each issue, so the other thing you can do is to buy a later issue and look for the advertisements for the back issues to see what's contained in these earlier issues.

PM me if you're looking for some scans.  I'll see what I can do.