
- Programming in Prolog: Using the ISO Standard
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From $35.74 (New)

| Latest | $35.74 Apr 15, '16 |
| Highest | $40.80 Jun 14, '14 |
| Lowest | $26.84 Aug 31, '15 |
| Average | $35.74 (30d avg) $35.18 (90d avg) $32.52 (180d avg) $32.46 (365d avg) $32.57 (Lifetime average) |
| Added | Sep 14, 2013 |
| Latest | $23.07 Apr 15, '16 |
| Highest | $30.12 Dec 22, '14 |
| Lowest | $20.00 Jun 30, '15 |
| Average | $23.88 (30d avg) $23.74 (90d avg) $23.88 (180d avg) $23.67 (365d avg) $24.61 (Lifetime average) |
| Added | Sep 14, 2013 |
| Latest | $16.08 Apr 15, '16 |
| Highest | $30.76 Jan 9, '15 |
| Lowest | $9.90 Aug 6, '14 |
| Average | $17.48 (30d avg) $16.54 (90d avg) $18.20 (180d avg) $18.67 (365d avg) $18.27 (Lifetime average) |
| Added | Sep 14, 2013 |
30 day average: 424,935
90 day average: 553,472