TY  - BOOK
AU  - Bretz,Rudolf
TI  - A taxonomy of communication media
T2  - A Rand Corporation research study
SN  - 0877780129
AV  - P90 .B68
U1  - 301.161 
PY  - 1971///]
CY  - Englewood Cliffs, N.J.
PB  - Educational Technology Publications
KW  - Mass media
KW  - Local
N1  - Includes bibliographical references
ER  -