@book{oai:yamagata.repo.nii.ac.jp:00002975,
 author = {Yokoyama,  Akio and Hayakawa,  Masanobu},
 month = {Oct},
 note = {図書の1章, This English version is translated by Masanobu Hayakawa 「歴史の中の最上川」(http://repo.lib.yamagata-u.ac.jp/handle/123456789/2451\n)の英語訳（16p ; 30cm）},
 publisher = {Yamagata University Library},
 title = {The Mogami River in the Making of the History},
 year = {2007}
}