Proceedings of the IRE volume 37 number 4, April 1949.
IRE 1949, pp 338 - 464 inclusive, plus sep. numbered adverts. at front and rear. Whole issue in original wraps, as issued.
IRE 1949, pp 338 - 464 inclusive, plus sep. numbered adverts. at front and rear. Whole issue in original wraps, as issued.