It is from the magazine Cult Movies, issue #29, pages 66-70. Contributors to the article are Brad Linaweaver, Forrest J Ackerman, William Alan Ritch, George Mulligan, J. Neil Schulman, David T. Lindsay, and Dafydd ab Hugh. The back issue is still available through the Cult Movies website, at least for now.
Click on the link to start reading with the first page. The files are all .jpg format around 500k in size.