Stoykov E. HYDROGRAPHIE ACOUSTIC SYSTEMS - MEASUREMENT PRINCIPLES: HYDROGRAPHIE ACOUSTIC SYSTEMS - MEASUREMENT PRINCIPLES. JSAR [Internet]. 2023 Nov. 23 [cited 2024 Nov. 21];24(1):32-7. Available from: https://jsar.ftn.shu.bg/ojs-3.3.0-7/index.php/jsar/article/view/365