Copyright notice in the front of 6th: 1974, 1976, 1981, 1985, 1990, 1995. I assume that those are the dates of 1st through 6th editions.
This thread has caused me to spend more money: I just found and ordered what I believe to be the 5th edition (1990-07) on Biblio.com. So I'll probably PDF that as well. I work on bikes right next to my bed/computer (hey, that's urban living, for better or worse), and it's easier for me than leafing through the book.
Last edited by Charles Wahl; 10-01-11 at 10:50 AM.