Adreßbücher:lnformation C 133.554 

K r u z a s , Anthony T. -Enc~c1opedia of 
information systems and serv~ces. An 
internat. guide to computer-readab1e 
data~bases••• Ed. by Anthony T. Kruzas 
and John Schmittroth. 4th ed. -Detroit, 
Mich.: Ga1e Research (1978). XIII,933 s. 40