http://www.cleanenergy.org/2013/09/18/blast-zone-warning-the-threat-of-seismic-airgun-testing-educational-forum/chs_seismic_forum_flier/

SACE | Southern Alliance for Clean Energy

Blast Zone Warning: The Threat of Seismic Airgun Testing – Educational Forum Attachments

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CHS_Seismic_Forum_Flier
CHS_Seismic_Forum_Flier