Assessment of exposure packaging worker and designing work methods using OCRA index in fertilizer producer companyAinun Dwi Fridayati, Wiediartini, Haidar Natsir Amrullah, Muhammad Shah, Urip Mudjiono and Edy Prasetyo HidayatMATEC Web Conf., 204 (2018) 03013DOI: https://doi.org/10.1051/matecconf/201820403013