TY - JOUR AU - B. Muhlfelder AU - James Beall AU - M. Cromar AU - Ronald Ono C2 - Applied Physics Letters DA - 1986-10-01 00:10:00 LA - en M1 - 49 PB - Applied Physics Letters PY - 1986 TI - Very Low Noise, Tightly Coupled, dc SQUID Amplifiers ER -