TY  - BOOK
AU  - C. v . durell, m.a.
TI  - Advanced trigonometer: C. v . durell, m.a. , A. robson, m.a
U1  - 516.24 
PY  - 1953///
CY  - London
PB  - G. bell and sons, ltd
KW  - MCE
N1  - 0; 0; 0; 516_240000000000000_DUR; 0; 0; 0; 516_240000000000000_DUR; 0; 0; 0; 516_240000000000000_DUR
ER  -