Kommunikationsforschung B 131.131 

Two-way-eable-television.-Two-way Cable 
Television. Experienees with pilot projeets 
in North Ameriea, Japan and Europe. Proeeedings 
of a symposium held in Munieh, April 
27-29, 1977. Ed. by W. Kaiser, H. Marko 
and E. Witte. With 70 fig. and 8 tab.-Berlin, 
Heidelbeög [usw.J: Springer 1977. 
VII, 292 S. 8