Le VA. A STUDY OF THE CHARACTERISTICS OF VIETNAMESE MAPS IN THE 19th CENTURY WITH SPECIAL REFERENCE TO HOÀNG LÊ CẢNH HƯNG BẢN ĐỒ. JSTLU-B [Internet]. 2023Feb.22 [cited 2024Apr.28];1(2):60-9. Available from: https://science.thanglong.edu.vn/index.php/volb/article/view/30