I have enjoyed using Google Books to search old copies of Billboard magazine, copies of which have been archived going back to the 1940s. Additionally, Billboard magazine has the same search capability on their site (in cooperation with Google). I tried both and it seems to work more seamlessly on Google Books. I ran a search on "Tommy Cogbill" and got loads of hits from the late sixties and early seventies. You really get a sense of being there!
The most efficient way is to go to the link below (Advanced Google Book Search) and limit the search to magazines:
Or, as noted above, the same search capability is available from Billboard's site:
Here's an example of a search for articles mentioning Tommy Cogbill: