1. Selective filtering of light by coniferous forests and minimum light energyrequirements for regeneration;Atzet;Can. J. Bot.,1970
2. Principles of Silviculture;Baker,1950
3. Silvics of North America, Vol. 1, Conifers;Burns,1991
4. Forest floors under second-growth Douglas-fir stands: their chemical variability and some relationships to productivity;Carter,1982
5. Principles of Silviculture;Daniels,1979