REPLACING ORTHOMETRIC HEIGHTS WITH ELLIPSOIDAL HEIGHTS IN ENGINEERING SURVEYS. Nigerian Journal of Technology, [S. l.], v. 35, n. 4, p. 761–768, 2016. DOI: 10.4314/njt.354.1167. Disponível em: https://nijotech.com/index.php/nijotech/article/view/1167.. Acesso em: 13 may. 2024.