[1] 四手井綱英『ものと人間の文化史森林 (3)』, 法政大学出版会, 2000
[2] Lund,-H. Gyde. rev* Definitions of Forest, Deforestation, Afforestation, and Reforestation. [Online] Gainesville, VA. 2018 : Forest Information Services, Misc. pagination. 2020