Re: "'m afraid I will not be able to help you directly on this one. I can't even remember where I got my copy. There are no references as to a source on the paper. If the AIEE had a Proceedings Journal, like the IRE, now IEEE, you could probably find it there." If you have the paper now, could you be induced to (at your leisure, of course) copy it and send me a copy? Would be glad to reimburse you for your expense. Ed