Proceedings of the IRE volume 37 number 9, September 1949.
IRE 1949, pp 978 - 1104 inclusive, plus sep. numbered adverts. at front and rear. Whole issue in original wraps, as issu.
IRE 1949, pp 978 - 1104 inclusive, plus sep. numbered adverts. at front and rear. Whole issue in original wraps, as issu.