Sorry about that....check this out:
www.finescale.com/.../January%201999.aspx
Under features it says,
"Modeling the original X-15 Conversion
By Christopher Crofoot
Backdating Monogram's 1/72 scale X-15A-2."
Same author Paul was talking about, just a wee bit farther back. How to get the article I cannot help you, but at least you now know what issue it is in. Best of luck.