Chapter 11 【main reference】

"フロか教える林の技术、山の工作法" (Toshiyuki Niijima, National Forestry Improvement Popularization Association) "leaf.実．The bark is not sure にねかる図鉴" (Yongo Suzuki. Nippon Bunyusha) "Yakushima の Yamashou Millennium の Official Affairs" (Hisao Takada. Wenkishuki/Shiono Yone Song. Sosisha) "The 5th Mori の 闻き书き Koshien 闻き书き Collection of Works in 2018" (The 5th Mori の 闻き书き Koshien Administrative Committee) "Heisei 18 Edition Forest.Forestry White Book (edited by Hayano Office)