@article{33777, author = "Kelsey, J. and Edge, A. C. R. and Communication présentée a l´onziéme assemblée générale de ĺ Union Géodésique et Géophysique Internationale - Toronto, 3 - 14 septembre 1957", title = "Trials of the Tellurometer Carried out Jointly by the Ordnance Survey of Great Britain and the South African Council for Scientific and Industrial Research ", note = "1 sv.", }