TY - CONF AU - J. Zimmerman C2 - Proc., 4th Intl. Conf. on Biomagnetism, , 1, CA DA - 1986-12-31 00:12:00 LA - en PB - Proc., 4th Intl. Conf. on Biomagnetism, , 1, CA PY - 1986 TI - Cryogenic Instrumentation for Biomagnetic Measurements ER -