GRIDAL PERDANA PERKASA, PT East Java Footwear, Sandal & Bathing Slippers, Hartono Sutanto, Lianawati Sutanto, Agustinus Sutanto. info@gradial-shoes.com (62-31) 7492022, 7493328 www.gradial-shoes.com (62-31) 7481322 Jl. Simo Tambaan II / 72 A