Efektifitas Poly Aluminum Chloride (PAC) terhadap reduksi bakteri esehericia coli pada proses pengolahan air baku kekeruhan tinggi: studi kasus pada instalasi I PAM DKI Jaya = The Poly Aluminum Chloride (PAC) affectivity in the esehericia coli bacteria reduction on the high level of turbidity of water treatment - Komalasari, author (Universitas Indonesia, 1996)