Larew, Karl G. (2005). "From Pigeons to Crystals: the development of radio communication in U.S. Army tanks in World War II". Historian. 67 (4): 664–677. doi:10.1111/j.1540-6563.2005.00126.x. S2CID143543753.
Larew, Karl G. (2005). "From Pigeons to Crystals: the development of radio communication in U.S. Army tanks in World War II". Historian. 67 (4): 664–677. doi:10.1111/j.1540-6563.2005.00126.x. S2CID143543753.