@article{UMEZAWA Taku20202020-007, title={A Cryogen-Free Automated Measurement System of Stable Carbon Isotope Ratio of Atmospheric Methane}, author={UMEZAWA Taku and ANDREWS Stephen J. and SAITO Takuya}, journal={気象集誌. 第2輯}, volume={advpub}, number={ }, pages={2020-007}, year={2020}, doi={10.2151/jmsj.2020-007} }