TY  - BOOK
AU  - 
AU  - Urban, Sean E., Ed.
AU  - Seidelmann, P. Kenneth., Ed.
TI  - Explanatory supplement to the astronomical almanac
SN  - 9781891389856
U1  - 528 
PY  - 2013///
CY  - California
PB  - University Science Books
KW  - Nautical almanacs
ER  -