@misc{indiciae22e9d0616827,
  title = {Improved Constraints on Global Methane Emissions and Sinks Using δ13C-CH4},
  author = {X. Lan and S. Basu and S. Schwietzke and L. M. P. Bruhwiler and E. J. Dlugokencky and S. E. Michel and O. A. Sherwood and P. P. Tans and K. Thoning and G. Etiope and Q. Zhuang and L. Liu and Y. Oh and J. B. Miller and G. Pétron and B. H. Vaughn and M. Crippa},
  year = {2021},
  url = {https://ntrs.nasa.gov/citations/20210015886},
  note = {Source identifier: 20210015886}
}