TY  - BOOK
AU  - Her Majesty's Nautical Almanac Office
TI  - The Nautical almanac1987 / 
SN  - 0117723584
U1  - 528 23
PY  - 1991///.
CY  - London : 
PB  - H. M. S. O, 
KW  - Nautical almanacs.
ER  -