TY  - BOOK
AU  - U.S. Governement Printing Office
TI  - The Astronomical almanac for the year 2018 
SN  - 9780707741772
U1  - 52 (059) /H.M.S.O. 
PY  - 2017///
CY  - Washington
PB  - U.S. G.P.O.
KW  - Astronomical ephemeris
KW  - Nautical almanacs
KW  - NAUTICAL ASTRONOMY
ER  -