TY  - BOOK
AU  - Winter, W. Percy
ED  - 
TI  - Trigonometry for navigating officers
U1  - 516.24 Win/Tri 
PY  - 1928///
CY  - London
PB  - Sir Isaac Pitman & Sons
KW  - Trigonometry
N1  - Appendix, Haversine tables, Summary of formulae, Index
ER  -