%0 Journal Article %T Assessment of defoliation during a pine sawfly outbreak: Calibration of airborne laser scanning data with hemispherical photography %A Hanssen, Kjersti Holt %A Solberg, Svein %A , %J Forest Ecology and Management %V 250 %N 1-2 %P 9-16 %@ 0378-1127 %D 2007-10-01 %I Elsevier BV %~ DeepDyve