TY  - BOOK
ED  - Her Majesty's Stationery Office
TI  - Astronomical ephemeris for the year 1968
U1  - 52(059) H. M. S. O 
PY  - 1967///
PB  - Her Majesty's Stationery Office
KW  -  NAUTICAL ASTRONOMY
KW  -  Zonnestelse
ER  -