@article{oai:niigata-u.repo.nii.ac.jp:00025259,
 author = {山野井, 徹},
 journal = {新潟応用地質研究会誌, 新潟応用地質研究会誌},
 month = {Mar},
 pages = {5--5},
 title = {絶滅の時代?!},
 volume = {47},
 year = {1997}
}