28.
Portugal National Report on Geodetic Works 1987 - 1990
/ IUGG XX General Assembly IAG, Vienna, August 11-24, 1991
Lisboa: Inst. geod. e cadastral, 1991
Signatura: K46857
29.
Parameters of Common Relevance of Astronomy, Geodesy, and Geodynamics. 1987 - 1991
/ IUGG XX General Assembly IAG, Vienna, August 11-24, 1991
Vienna: IUGG Vienna, 1991
Signatura: K46826
30.
Optical Interferometry and Short Range Distance Measurement
/ Dodson, A.H. ; IUGG XX General Assembly IAG, Vienna, August 11-24, 1991
Nottingham: University Nottingham, 1991
Signatura: K46829
31.
Nonlinear Adjustment. IAG Special Study Group 4.120. Period 1987 - 1991. IUGG General Assembly, Vienna, 11-24 August 1991
/ Teunissen, P.J.G. ; IUGG XX General Assembly IAG, Vienna, August 11-24, 1991
Delft: University of Technology Delft, 1991
Signatura: K46831
32.
New Zealand Geodetic Operations 1987 - 90. Vienna, Austria, August 1991
/ IUGG XX General Assembly IAG, Vienna, August 11-24, 1991
Wellington: New Zealand National Committee for Geod., Geophys., 1991
Signatura: K46835
33.
National Report on Gravimetry in Finland, 1987 - 1990. The 20 General Assembly of the IUGG. Vienna, August 1991
/ Kiviniemi, Aimo ; IUGG XX General Assembly IAG, Vienna, August 11-24, 1991
Helsinki: Fin. Geod. Inst., 1991
Signatura: K46817
34.
National Report of the Federal Republic of Germany on the Geodetic Activities in the years 1987 - 1990
/ IUGG XX General Assembly IAG, Vienna, August 11-24, 1991
München: Verlag Bayer. Akad. der Wissenschaften, 1991
Signatura: K46850
35.
National Report of Geodetic Commission of Turkey
/ Gen. Com. Mapp. ; IUGG XX General Assembly IAG, Vienna, August 11-24, 1991
Ankara: Gener. Comm. of Mapping, 1991
Signatura: K46837
36.
National Report 1987 - 1990 for the 20. General Assembly of the International Union of Geodesy and Geophysics, Vienna, August 11 - 24, 1991. IAG
/ IUGG XX General Assembly IAG, Vienna, August 11-24, 1991
Warsaw: Inst. Geodesy and Cartogr. Warsaw, 1991
Signatura: K46842
37.
IUGG/IAG Special Study Group 5-98. Atmospheric Excitation of the Earth's Rotation. Final Report: 1987 - 91
/ Dickey, J.O. ; IUGG XX General Assembly IAG, Vienna, August 11-24, 1991
Vienna: IUGG Vienna, 1991
Signatura: K46834