TY - JOUR AU - Donald McDonald AU - A. Risley AU - J. Cupp AU - K Evenson AU - J. Ashley C2 - Applied Physics Letters DA - 1972-04-01 00:04:00 LA - en M1 - 20 PB - Applied Physics Letters PY - 1972 TI - Four-Hundredth-Order Harmonic Mixing of Microwave and Infrared Laser Radiation Using a Josephson Junction and a Maser ER -