*0011591352 *008920428s1991 xx# 000 0 nob *019 $bk *08230$a628.10285 *100 $aYstad, Dag$_156341100 *245 $aGIS i VA$bfelles datagrunnlag for planlegging og drift *300 $aS. 462-467 : ill. *773 $tVann$gÅrg. 26, nr 4 (1991)$x0042-2592$w(NO-LaBS)916349(tnr) *999 $z9200139238$anorart:9200139238 ^