@article{9315, author = "Graeve, Chairman Jan de and FIG '98. XXI International Congress", title = "FIG '98. XXI International Congress : Developing the profession in a developing world. Commission 11 : Papers from the ad hoc Commission on history of surveying ", year = "1998", note = "Lit. - Abstr. - Biogr. - 1 sv., 1 sv.", }