English: Distribution of the Trombiculid mites and Rickettsia holding field voles in Niigata Prefecture and their epidemiological significance [2] Investigation in the middle basin of the River Shinano
Japanese: 新潟縣に於けるツツガ虫及び「リケッチア」保有野鼠の分布並びにその疫学的意義に就て第 2 報信濃川中流に於ける調査研究