| URL: | http://www.pbs.org/wgbh/nova/lostempires/obelisk/ |
| Format: | Website |
| Publisher: | NOVA Online is produced for PBS by the WGBH Science Unit |
| Publication City: | Boston |
| Subject(s): | |
| Permalink: | http://etana.library.vanderbilt.edu/node/5866 |
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