TY  - BOOK
AU  - William C. Hall
TI  - Searching into chemistry : questions for secondary schools
SN  - 050022326
U1  - 540.7 H181s 
PY  - 1970///
CY  - Edinburgh
PB  - Oliver & Boyd
KW  -  Chemistry
KW  -  Problems, exercises, etc. Chemistry
ER  -