- Inventing American Broadcasting, 1899-1922 (Johns Hopkins Studies in the History of Technology)
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From $25.27 (New)
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| Latest | $25.27 Apr 16, '16 |
| Highest | $28.00 Dec 4, '15 |
| Lowest | $22.63 May 4, '14 |
| Average | $25.40 (30d avg) $25.85 (90d avg) $26.26 (180d avg) $26.26 (365d avg) $25.21 (Lifetime average) |
| Added | May 4, 2014 |
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| Lowest | $14.20 Apr 16, '16 |
| Average | $15.55 (30d avg) $16.52 (90d avg) $19.26 (180d avg) $19.95 (365d avg) $19.36 (Lifetime average) |
| Added | May 4, 2014 |
| Latest | $1.58 Apr 16, '16 |
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| Average | $1.87 (30d avg) $2.43 (90d avg) $3.84 (180d avg) $4.09 (365d avg) $3.55 (Lifetime average) |
| Added | May 4, 2014 |
30 day average: 507,738
90 day average: 677,655