1. Department of Forestry, Ministry of Agriculture and Forestry, 1926, Forestry of the “Sugi” (Cryptomeria japonica, Don.) and the “Karamatsu” (Larix leptolepis, Gord.), Tokio.
2. FAO, 1956, Tree Planting Practices in temperate Asis: Japan. FAO Forestry Development Paper No. 10, Roma.
3. Forest Research Station Sapporo, 1960, Yield tables of important trees in Hokkaido, Sapporo (japanisch).
4. Forestry Agency, 1957, Forestry of Japan, II. ed., Tokyo.
5. Forestry Agency, 1960, Forestry of Japan, Tokyo.