Hatheway, W. H.; Waring, Richard H.; Koch, W.; U.S. International Biological Program. Coniferous Forest Biome; University of Washington(Seattle : University of Washington, 1972)
Hatheway, W. H.; Smith, Milton B.; Smith, Steven; U.S. International Biological Program. Coniferous Forest Biome; University of Washington(Seattle : University of Washington, 1971)
