2 1 20 Raden Didiet Rachmat Hidayat Primary Author OlFebri OlFebri Primary Author Euis Saribanon Primary Author Aisyah Rahmawati Primary Author Sandriana Marina Primary Author mixed material 26553570 Jakarta PKM CSR 2018 Raden Didiet Rachmat Hidayat Primary Author Sandriana Marina Primary Author Lira Agusinta Primary Author Aswanti Setyawati Primary Author Aisyah Rahmawati Primary Author mixed material Vietnam International Conference on Operations and Supply Chain Management ke-9. Vietnam 2019