@article{16970, author = "Fejes, I. and Symposium of the IAG Subcommission for Europe (EUREF), Bad Neuenahr - Ahrweiler, 10 - 13 June, 1998", title = "Main achievements of the long - term international cooperation in the frame of the CEI Copernicus project CERGOP : paper presented at the Symposium of the IAG Subcommission for Europe (EUREF), Bad Neuenahr - Ahrweiler, Germany, 10 - 13 June 1998 ", year = "1998", note = "Lit., Summ., 1 sv.", }