TY  - BOOK
AU  - Urban, Sean E.
AU  - Seidelmann,P.Kenneth
TI  - Explanatory supplement to the Astronomical almanac
SN  - 9781891389856 (alk. paper)
U1  - 528 
PY  - 2013///
CY  - Mill Valley, Calif.
PB  - University Science Books
KW  - Nautical almanacs
ER  -