SEMEN INDONESIA Tbk, PT East Java Cement, Of Portland Cement, Other Hydraulic Cements, White Cement, Dwi Soetjipto, Mahendra Siregar. info@semenindonesia.com (62-31) 3981732, 3981745, 3981773, 3981731 www.semenindonesia.com (62-31) 3983209, 3972264 Utama Semen Gresik Bldg 9th-11th Floor, Jl. Veteran No. 230