@article{oai:nipr.repo.nii.ac.jp:00004464,
 author = {Amari,Sachiko and Ozima,Minoru and Hamano,Yozo},
 journal = {Proceedings of the NIPR Symposium on Antarctic Meteorites},
 month = {Mar},
 note = {P(論文), We measured the He content and the ^3He/^4He ratio of a K-T boundary clay from Hokkaido. If some meteoritic debris which escaped total melting or evaporation at the K-T event remains in the clay, it may be possible to observe some ^3He in it. However, we could determine only the upper limits of the ^3He/^4He ratois (<6.2×10^<-6> for a bulk sample) because of the small amount of ^3He. Three alternatives are considered to explain the result.},
 pages = {310--314},
 title = {The 3He/4He ratio in a clay from the K-T boundary,Hokkaido, Japan},
 volume = {1},
 year = {1988}
}