TY - BOOK AU - Levin, Harvey Joshua, 1924- PB - Published for Resources for the Future, by Johns Hopkins Press TI - The invisible resource; use and regulation of the radio spectrum [by] Harvey J. Levin KW - Radio frequency allocation -- United States. KW - Radio -- Law and legislation -- United States. CY - Baltimore SN - 0801813166 N1 - Includes bibliographical references. PY - 1971 M1 - Accessed from https://nla.gov.au/nla.cat-vn1931689 ER -