TY  - BOOK
AU  - Levin,Harvey J.
TI  - The invisible resource: use and regulation of the radio spectrum 
SN  - 0801813166
PY  - 1971///
CY  - Baltimore
PB  - Published for Resources for the Future by the Johns Hopkins Press
KW  - Radio frequency allocation
KW  - United States
KW  - Radio
KW  - Laws and legislations
N1  - Includes fold. sheet (col. illus.)'The electromagnetic spectrum' in pocket available at Cawangan Alat Pandang Dengar under the same call number
ER  -