
- Visual Language for Designers: Principles for Creating Graphics that People Understand
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From $24.89 (New)

| Latest | $24.89 Apr 16, '16 |
| Highest | $26.29 Jan 19, '16 |
| Lowest | $18.74 Aug 17, '15 |
| Average | $25.34 (30d avg) $25.97 (90d avg) $25.66 (180d avg) $24.44 (365d avg) $22.89 (Lifetime average) |
| Added | Sep 10, 2013 |
| Latest | $8.18 Apr 16, '16 |
| Highest | $18.89 Jul 23, '14 |
| Lowest | $3.44 Oct 20, '15 |
| Average | $8.18 (30d avg) $7.82 (90d avg) $6.98 (180d avg) $6.86 (365d avg) $11.53 (Lifetime average) |
| Added | Sep 10, 2013 |
| Latest | $5.50 Apr 16, '16 |
| Highest | $17.98 Nov 7, '14 |
| Lowest | $3.00 Dec 2, '15 |
| Average | $5.50 (30d avg) $7.60 (90d avg) $7.36 (180d avg) $6.71 (365d avg) $11.06 (Lifetime average) |
| Added | Sep 10, 2013 |
30 day average: 237,041
90 day average: 220,351