Photograph from the International Conference on Archaeological Prospection held in Vienna, Austria, on September 19-23, 2001.

Dan Delea, instructor from Geophysical Survey Systems, Inc., instructs University of Arkansas graduate student Jenny Bales in the use of the GSSI SIR-system 2000 at the recent workshop 'Interpreting Archeological Ground Penetrating Radar Data,' held at the University of Arkansas in November, 2001.

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Delegates to the 4th International Conference on Archaeological Prospection, held in Vienna, encircle the magnetically mapped Puch Neolithic ring enclosure while being photographed from the air by the Austrian Army.

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