QUYÊN. CASE STUDY OF RAIN PARAMETERS IN HANOI BY THE DROP SIZE MEASUREMENT EQUIPMENT THAT BASED ON OPTICAL PRINCIPLE. Journal of Military Science and Technology, [S. l.], n. 70, p. 45–53, 2020. Disponível em: https://jmst.mod.gov.vn/index.php/jmst/article/view/110. Acesso em: 26 jan. 2026.