@article{oai:niigata-u.repo.nii.ac.jp:00025350, author = {沼田, 誠}, journal = {新潟応用地質研究会誌, 新潟応用地質研究会誌}, month = {Jun}, pages = {63--64}, title = {地質と娯楽あれこれ}, volume = {36}, year = {1991} }