TY - BOOK AU - POLYTECHNIQUE PRESS TI - ACTIVE NETWORKS AND FEEDBACK SYSTEMS PROCEEDINGS OF THE SYMPOSIUM ON NEWYORK APRIL 19, 20 , 21 1960 U1 - 621.3192 ACT'P PY - 1961/// CY - USA PB - POLYTECHNIQUE KW - FEEDBACK SYSTEMS NETWORKS-ACTIVE PAST PRESENT AND FUTURE ER -