TY  - BOOK
AU  - Spellman, Frank R.
TI  - Mathematics manual for water and wastewater treatment plant operators
SN  - 1-56670-675-0
PB  - CRC Press
UR  - http://krc.clri.res.in:80/cgi-bin/koha/opac-detail.pl?biblionumber=11104
ER  -