XIX congress...Helsinki, June 10-19 1990: (Volume 0: official report of the congress).
XIX congress...Helsinki, June 10-19 1990: (Volume 0: official report of the congress).
- Helsinki FIG 1991
- 225p. : ill. ; 21cm.
9519609741
CONFERENCES
SURVEYORS
526.9
9519609741
CONFERENCES
SURVEYORS
526.9