*0011682465 *008961024s1981 xx# 000 0 nob *019 $bk *08230$a628 *100 $aEllingsen, Knut$_155051200 *245 $aGrunne ledninger$bdrikkevannshygienen *300 $aS.157-158 *773 $tVann$gÅrg.16, nr.2 (1981)$x0042-2592$w(NO-LaBS)916349(tnr) *999 $z9600036940$anorart:9600036940 ^