Degradasi 4,4' - dikloro bifenil dengan kombinasi proses fotokatalis dan radiasi gamma menggunakan nanokomposit karbon aktif-zeolit alam-TiO2 = degradation of 4,4'- dichloro biphenyl by combination process of photocatalytic and radiophotocatalytic using activated carbon-natural zeolite-TiO2 nanocomposite - Indragini, author (2011)