June 30 (Reuters) - Dawson Geophysical Co DWSN.O
* Dawson geophysical co - on june 30,co entered amendment
to amended and restated loan and security agreement - sec filing
* Dawson geophysical co - revolving credit facility now
matures on june 30, 2018
* Dawson geophysical co - amended loan agreement continues
to provide for a revolving credit facility in an amount up to
$20 million
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