TY  - BOOK
AU  - Urban, Sean E
AU  - Seidelmann, P. Kenneth
TI  - Explanatory supplement to the astronomical almanac
SN  - 978-1-891389-85-6
PY  - 2013///
CY  - California
PB  - University Science
KW  - Astronomical almanac for the year 2013 supplement
KW  - Nautical almanacs
ER  -