
- Engineers: A History of Engineering and Structural Design
-
Amazon
From $35.35 (New)

From $35.35 (New)

| Last Seen | |
| Highest | $48.95 Feb 9, '16 |
| Lowest | $31.83 Apr 27, '15 |
| Average | $36.93 (30d avg) $42.30 (90d avg) $45.59 (180d avg) $41.97 (365d avg) $41.16 (Lifetime average) |
| Added | Oct 7, 2013 |
| Last Seen | |
| Highest | $41.81 Jul 7, '14 |
| Lowest | $29.56 Mar 26, '15 |
| Average | $32.92 (30d avg) $37.62 (90d avg) $39.01 (180d avg) $37.79 (365d avg) $37.51 (Lifetime average) |
| Added | Oct 7, 2013 |
| Last Seen | |
| Highest | $40.00 Jan 5, '16 |
| Lowest | $18.05 Jul 2, '14 |
| Average | $32.42 (30d avg) $35.67 (90d avg) $37.70 (180d avg) $37.68 (365d avg) $35.17 (Lifetime average) |
| Added | Oct 7, 2013 |
30 day average: 2,128,399
90 day average: 1,902,147