
- Grace Hopper and the Invention of the Information Age (Lemelson Center Studies in Invention and Innovation series)
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| Highest | $62.44 Nov 17, '15 |
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| Average | $41.76 (30d avg) $47.83 (90d avg) $45.06 (180d avg) $45.24 (365d avg) $38.40 (Lifetime average) |
| Added | May 3, 2014 |
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| Average | $4.37 (30d avg) $5.07 (90d avg) $5.36 (180d avg) $6.56 (365d avg) $5.46 (Lifetime average) |
| Added | May 3, 2014 |
30 day average: 624,469
90 day average: 568,105