[Leon]

Dave- I just checked again. My blue hardback, like the one listed in the auction (I think), is dated 1960. I use the green copy one every day and it is dated 1988.

I will have to check that other question....not sure.

aha....I see the one listed on ebay is a soft cover. It probably is a 1967 then. It's confusing as the 1960 hard cover edition has a book cover that looks exactly like that 1967 reprint.