http://industrikimia.com/berita/seorang-pekerja-tewas-akibat-gas-hidrogen-sulfida-h2s Info & Tutorial Seputar Industri Kimia, Pabrik Kimia dan Bahan Kimia Sun, 24 Oct 2010 09:22:57 +0000 http://wordpress.org/?v=2.9.1 hourly 1