NZ Geomechanics News NZ Geomechanics News NZGS Published 12/01/1991 Downloads 43_Dec1991_NZGeoNews-3.pdf Published 12/01/1991 Collection NZ Geomechanics News Compilation NZ Geomechanics News>Issue 43 - December 1991 Issue 43 Location New Zealand Type Magazine (full) ISSN 0111-6851