@article{oai:hirogaku-u.repo.nii.ac.jp:00000507,
 author = {Kitamura, Shigeru},
 journal = {弘前学院大学社会福祉学部研究紀要},
 month = {Mar},
 note = {Article},
 pages = {17--32},
 title = {Wide-spread tephras as a time-marker and chronological framework of eruptive history in the Berlín-Pacayal volcanic framework of eruptive history in the Berlín-Pacayal volcanic area, eastern El Salvador, Central America.},
 volume = {18},
 year = {2018}
}