
HF Communications: A Systems Approach-
Amazon
From $132.95 (New)

From $132.95 (New)

| Last Seen | |
| Highest | $132.95 Aug 23, '15 |
| Lowest | $102.59 Aug 16, '14 |
| Average | $132.95 (30d avg) $132.95 (90d avg) $132.95 (180d avg) $132.38 (365d avg) $123.20 (Lifetime average) |
| Added | Sep 19, 2013 |
| Last Seen | |
| Highest | $128.95 Mar 31, '16 |
| Lowest | $51.98 Jun 24, '14 |
| Average | $107.16 (30d avg) $109.68 (90d avg) $111.59 (180d avg) $113.61 (365d avg) $109.96 (Lifetime average) |
| Added | Sep 19, 2013 |
| Last Seen | |
| Highest | $116.99 May 22, '15 |
| Lowest | $13.25 Mar 31, '16 |
| Average | $32.73 (30d avg) $29.07 (90d avg) $27.88 (180d avg) $53.83 (365d avg) $63.43 (Lifetime average) |
| Added | Sep 19, 2013 |
30 day average: 2,069,936
90 day average: 1,817,355