@book{ BB1500927X, author = "河合, 明宣 and 堀内, 久太郎 ", title = "アグリビジネスと日本農業", publisher = "放送大学教育振興会", year = "2014", series = "放送大学教材", number = "1639331-1-1411", URL = "https://ci.nii.ac.jp/ncid/BB1500927X" }