Identification of Trace Element in Ambient Air Case Study: Industrial Estate in Waru, Sidoarjo, East JavaOleh Admin Be FT / March 13, 2024 2020, Gita Pati Humairoh; Arie Dipareza Syafei; Muhayatun Santoso; Rachmat Boedisantoso; Abdu Fadli Assomadi; Joni Hermana