Fernsehen:Kabelfernsehen B 131.131 

Two-way-cable-television.-Two-way Cable 
Television. Experiences with pilot projects 
in North America, Japan and Europe. Proceedings 
of a symposium held in Munieh, April 
27-29, 1977. Ed. by W. Kaiser, H. Marko 
and E. Vlitte. With 70 fIg. and 8 tab.-Berlin, 
Heidelbesg [usw.J: Springer 1977. 
VII, 292 S. 8