TY  - BOOK
AU  -  Eicher,Jean-Claude
TI  -  The economics of new educational media : :  vol.3 : cost and effecti veness overview and synthesis / 
PY  - 1982///
CY  -  Paris : 
PB  -  The Unesco Press, 
KW  -  Teaching
KW  -  Aids and devices
N1  -  Includes bibliographical references (p.143 - 150)
ER  -