Hi,

May be of interest: 

USGS Releases New Standards for Natural Gas
https://www.usgs.gov/news/usgs-releases-new-standards-natural-gas


Let me know if you need more information, publications, etc...

Enjoy the day,
Emily



Emily C. Wild
Librarian (Physical Scientist)
U.S. Geological Survey, Denver Library
Denver Federal Center
ph: (303) 236-1003
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USGS Libraries: http://library.usgs.gov