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Mark Sogge and Charles van Riper III at van Riper's retirement party

By Office of Science Quality and Integrity
Mark Sogge and Charles van Riper III at van Riper's retirement party
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Detailed Description

Mark Sogge, a former van Riper graduate student and currently a USGS Regional Director, the MC at Charles van Riper's retirement party in Flagstaff, AZ.

Sources/Usage

Public Domain.