TY  - BOOK
AU  -  Ball,W.J.
TI  -  Thinking it out / 
U1  -  371.262 BAL 
PY  - 1966///
CY  -  London : 
PB  -  Longmans, Green & Co., 
KW  -  Education
KW  -  Great Britain
KW  -  Examinations
ER  -