TY  - BOOK
ED  -  Her Majesty's Stationery Office
TI  - Astronomical ephemeris for the year 1971
U1  - 52(059) H.M. S. O 
PY  - 1969///
PB  -  Her Majesty's Stationery Office
KW  - Zonnestelse
KW  -  NAUTICAL ASTRONOMY
ER  -