@phdthesis{oai:tsukuba.repo.nii.ac.jp:00011059,
 author = {猪狩, 俊一郎 and Igari, Shunichiro},
 month = {},
 note = {2000, Includes bibliographical references},
 school = {筑波大学, University of Tsukuba},
 title = {Organic geochemical study of major natural gases in Japanese gas fields},
 year = {2001}
}