TY  - BOOK
AU  - Durell, Clement V.
TI  - Certificate mathematics
SN  - 0173519134
AV  - QA107 .D87 1971
PY  - 1971///
CY  - London
PB  - Bell and Hyman
KW  - Certificate
KW  - Mathematics
N1  - Includes index
ER  -