International Symposium Satellite and Terrestial Triangulation. Graz, Austria. Part I: Sessions of the West European Sub - Commission of the International Commission for Artificial Satellites, I.A.G., May 29. - 31, 1972 |
International Symposium Satellite and Terrestial Triangulation, Graz, Austria, May 29. - 31, 1972, I.A.G., Part I