Sukmawati Tansil Tan; Ernawati Ernawati; Alexander Halim Santoso; Yohanes Firmansyah; Anggita Tamaro; William Gilbert Satyanegara. Community Service Activities – Education And Screening For Damage Of Facial Skin Hydration Caused By Sun Exposure In Adolescent Boys . sejahtera 2023, 2, 120-130.