TY  - BOOK
AU  - Willis,Edgar E.
AU  - Aldridge,Henry B.
TI  - Television, cable, and radio: a communications approach 
SN  - 0138980659
PY  - 1992///
CY  - Englewood Cliffs, N.J.
PB  - Prentice-Hall
KW  - Broadcasting
KW  - United States
ER  -