Proceedings of the IRE volume 37 number 12, December 1949.
IRE 1949, pp 1362 -1496 inclusive, plus sep. numbered adverts. at front and rear, and cumulative 1949 Index at rear.
IRE 1949, pp 1362 -1496 inclusive, plus sep. numbered adverts. at front and rear, and cumulative 1949 Index at rear.
IRE 1949, pp 226 - 336 inclusive, plus sep. numbered adverts. at front and rear. Whole issue in original wraps as issued.