@article{oai:nipr.repo.nii.ac.jp:00004682,
 author = {Sugiura, Naoji and Zashu, Shigeo},
 journal = {Proceedings of the NIPR Symposium on Antarctic Meteorites},
 month = {Mar},
 note = {P(論文), Nitrogen isotopic composition of an R-group chondrite PCA 91002 was measured. A delta ^<15>N value as low as -60 permil was found in some combustion steps. Since this is a gas-rich meteorite, interpretation of the result is not straightforward, but with the aid of results on an H_2O_2-treated sample, we conclude that isotopically light nitrogen is indigenous to the meteorite.},
 pages = {273--285},
 title = {Isotopic composition of nitrogen in the PCA 91002 R group chondrite},
 volume = {8},
 year = {1995}
}