TY  - BOOK
AU  - Akeroyd,J.
TI  - Online information retrieval : : a comparison of manual and machine searching / 
U1  - 029 
PY  - 1976///
CY  - [s.l.]. : 
PB  - The Hatfield Polytechnic Library, 
KW  - Information storage and retrieval systems
ER  -