000 00453nam a22001097a 4500
082 _a628.16
_bWHO
245 _aGlobal workshop on appeopriate water and waste water treatment technology for developing countries
_cpublished by WHO International reference centre for community water supply
260 _anetherlands
_bby WHO International reference centre for community water supply
_c1977
300 _a48p.iii 4
650 _awater treatment
_91081
942 _cBK
999 _c242538
_d242538