a Flicker Alley Digital Edition from the National Library of Norway ; Norsk filminstitutt presenterer ; porduksjon, Helge Lunde ; Regi, Georg Schnéevoigt
Norsk institutt for skogforskning, Institutt for skogfag, NLH = Communications of Skogforsk / Norwegian Forest Research Institute [and] Department of Forestry, Agricultural University of Norway