Adreßbücher:Datenbanken C 129.611/IW 

Survey data-bases available. -Survey of commercially 
avaible computer-readable bibliographic Data Bases. 
Ed. by John H. Schneider, Marvin Gechmann, Stephen E. 
Furth. -(Washington, D.C.:) Amerlcan Society for 
Information Science (1973). 181 S. 4°