Sato T, Amano T, Ono H, Ishida H, Kodera H, Matsumura H, Yoneda M, Masuda R.* http://www.jstor.org/discover/10.2307/40316474?uid=3739232&uid=2129&uid=2&uid=70&uid=4&sid=47698788549417 Atsuko Okada Maritime Adaptations in Hokkaido .
Sato T, Amano T, Ono H, Ishida H, Kodera H, Matsumura H, Yoneda M, Masuda R.* http://www.jstor.org/discover/10.2307/40316474?uid=3739232&uid=2129&uid=2&uid=70&uid=4&sid=47698788549417 Atsuko Okada Maritime Adaptations in Hokkaido .