Investigation of dermal exposure to heavy metals (Cu, Zn, Ni, Al, Fe and Pb) in traditional batik industry workers oleh Katharina Oginawati, Suharyanto, Septian Hadi Susetyo, Gintang Sulung, Muhayatun, Nurul Chazanah, Siska Widya Dewi Kusumah, Nurul Fahimah