I have both the 1979 and the 1996 editions. The 96 version used some of the articles from the 79 edition and incorporated new articles from FSM. If you have FSM back issues then you?ll have all of them. These are the new articles in the 96 version.
Lighting AMT?s Klingon Battle Cruiser
Painting and Mounting a Klingon Bird of Prey
Wiring Ertl?s Next Gen Enterprise
Accurizing Ertl/AMT?s Starship Enterprise
Making Galileo Accurate
Science-Fiction Modeling with Junk
Hope this helps.
Alan