The Oil & Gas Journal, first published in 1902, is the world's most widely read petroleum industry publication. OGJ delivers international oil and gas industry news; analysis of issues and events; practical technology for design, operation, and maintenance of oil and gas operations; and important statistics on energy markets and industry activity.

OGJ is edited to meet the needs of engineers, geoscientists, managers, and executives throughout the oil and gas industry. It is part of Endeavor Business Media, Nashville, Tenn., which also publishes Offshore Magazine.

Endeavor Business Media’s Petroleum Group also produces targeted e-Newsletters; hosts global conferences and exhibitions, seminars, and forums; and publishes directories, technical books, print and electronic databases, surveys, and maps.

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For help with subscription purchases or refunds, or trouble logging into the paid subscription content on www.ogj.com, please contact Customer Service at ogj@omeda.com or call 1-847-559-7598.

For more customer service information, please click here.

Tantech Holdings Ltd. - Common Shares (NQ:TANH)

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