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| Date: | 1954 |
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| Description: | Raddatz Rockshelter and Natural Bridge, known by archaeologists as 47 SK-5. The bridge is made of sand stone, reaching 35 feet in height, and is the larges... |
| Date: | |
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| Description: | Native American petroglyph rock carving near Tucson. |
| Date: | 03 23 1927 |
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| Description: | Ensemble of diggings at Ali Bacha. View looking downhill towards three men working on an archaeological excavation in Algeria, Africa. On the left an indig... |
| Date: | 1929 |
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| Description: | A prehistoric station out among the dunes at Biskra, Algeria. |
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