Não informado. (1902). Journal of the College of Agriculture. Tohoku Imperial University.
Chicago-referens (17:e uppl.)Não informado. Journal of the College of Agriculture. Sapporo, Japão: Tohoku Imperial University, 1902.
MLA-referens (8:e uppl.)Não informado. Journal of the College of Agriculture. Tohoku Imperial University, 1902.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.