Analisis pajanan benzena melalui pemeriksaan konsentrasi s-phenylmercapturic acid (S-PMA) dalam urin terhadap kadar trombosit pada pekerja bengkel alas kaki di Desa Sukajaya Kecamatan Tamansari Kabupaten Bogor 2018 = Benzene exposure analysis through examination of s-phenylmercapturic acid (S-PMA) concentration in urine at platelet level in footwear workshop workers in Sukajaya Village Tamansari Sub District, Bogor Regency 2018 / Siti Norjannah