| http://digfir-published.macmillanusa.com/calc_tutorial/calc_tutorial_17_2_008.html | Chapter 1. calc_tutorial_17_2_008
| 50cd87c0b11c0f8802000001 |
| http://digfir-published.macmillanusa.com/calc_tutorial/calc_tutorial_17_2_008_dlap.xml | DLAP questions | 50cd87c0b11c0f8802000001 |