{"title":"Introduction to the Special Issue “Hard-rock Drilling Science: Challenges of Mantle Drilling”","authors":"S. Ono","doi":"10.5026/jgeography.130.457","DOIUrl":null,"url":null,"abstract":"","PeriodicalId":45817,"journal":{"name":"Journal of Geography-Chigaku Zasshi","volume":null,"pages":null},"PeriodicalIF":0.2000,"publicationDate":"2021-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Geography-Chigaku Zasshi","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.5026/jgeography.130.457","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"GEOGRAPHY, PHYSICAL","Score":null,"Total":0}