Preceramic sequences in the El Abra rock-shelters, Colombia. - Washington, D.C.
| Main Author: | Hurt, Wesley R. |
|---|---|
| Other Authors: | VanDerHammen, Thomas , Urrgeo Correal, Gonzalo |
| Published: |
1972.
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| Subjects: | |
| Included in: | Science ; 175.1972, no. 4026, S. 1106-1108. |
