Goldstein, M. H., Jr.; Sandel, T. T.; Kiang, Nelson Y-S.(Research Laboratory of Electronics (RLE) at the Massachusetts Institute of Technology (MIT), 1956-10-15)
Hughes, G. W.; Jacobsen, H. J.; Engel, A. I.; Halle, Morris(Research Laboratory of Electronics (RLE) at the Massachusetts Institute of Technology (MIT), 1956-10-15)