About 20 years ago I attended a seminar organised by J&W and presentations were given by Walt Jennings. At that seminar a booklet was distributed to all attendees. That booklet was written by Walt Jennings and was a nice and brief introduction to gas chromatography. Unfortunately, I lost somehow my copy of that booklet and I would like to find it somewhere. I am afraid I don't remember the title of that booklet, by the image of its cover is still vivid in my memory. Though I am now very experienced in GC, I am probably nostalgic to have it again in my library, but also to lend to new chromatographers. Would any of you know about this booklet and where I could get it as a hardcopy or in digital format?