TY  - BOOK
TI  - Aggregation functions 
SN  - 9780521519267 | 0521519268
PY  - 2009///
CY  - Cambridge
PB  - Cambridge University Press
UR  - http://www.loc.gov/catdir/enhancements/fy1004/2009288694-b.html | http://www.loc.gov/catdir/enhancements/fy1004/2009288694-d.html | http://www.loc.gov/catdir/enhancements/fy1004/2009288694-t.html
ER  -