@article{3796, author = "Rumpf, Walter Ehrhart and IUGG XVIII General Assembly, 1983, Hamburg", title = "Calibration of Compensator Levelling Instruments for Magnetic Errors at the Fachhochschule in Frankfurt/M. IUGG XVIII General Assembly, 1983, Hamburg ", year = "1983", note = "1 sv., obr. a tb. v textu, Liter.", }