TY  - BOOK
AU  - Langefors,Borje
TI  - Theoretical analysis of information system  
PY  - 1966///
CY  - Sweden: 
PB  - Studentlitterature, 
KW  - Information science
KW  - Information system
N1  - Vol. 1 400p. 
Vol. 2 400p
ER  -