The third. 1984. *shrugs* I should probably be grateful these weren't all recalled, burned or destroyed when they decided the seventh edition [1996] needed to be banned. *does not sound grateful in the least* Still. I'm sure one will turn up eventually. And if it doesn't... *only slightly strained* ...it won't really matter.
*conversationally, while the books are being rung up, packaged and reduced [for easier carrying]* Have you had better luck?