Nest-box studies on hole-nesting passerines in spruce forest : 1 : effect of nest hole availability on population density
S. Hågvar, O.J. Sørensen and E. LundSigmund Hågvar Artikkel Engelsk
*0011553715 *008900725s1990 xx# 000 0 eng *019 $bk *08230$a598 *100 $aHågvar, Sigmund$_123444700 *245 $aNest-box studies on hole-nesting passerines in spruce forest$b1 : effect of nest hole availability on population density$cS. Hågvar, O.J. Sørensen and E. Lund *300 $aS. 33-41 : kart *520 $aNorsk sammendrag *700 $aLund, E.$_165364900 *700 $aSørensen, Ole Jakob$_139569800 *773 $tFauna norvegica. Ser. C$gVol. 13, no. 1 (1990)$x0332-7701$w(NO-LaBS)317575(tnr) *999 $z9000121498$anorart:9000121498 ^