C 134.408 

Guide Dialog-searChin~.-Guide to DialogSearching. tBd 1-3. (9. print.) [Losebl.ausg.]-
Palo Alto, Ca.: Lockheed Dia18g In


formation Retrieval Service (1982). 4 
[1.) Text. 
[2.] Bluesheets. 
[3.] Yellowsheets •. Darin außerdem: Dialog


Lab.-workbook. 3. ed. 1981.