| http://digfir-published.macmillanusa.com/calc_tutorial/calc_tutorial_16_1_029.html | Chapter 1. calc_tutorial_16_1_029
| 50cb3c88b11c0f3b7a000000 |
| http://digfir-published.macmillanusa.com/calc_tutorial/calc_tutorial_16_1_029_dlap.xml | DLAP questions | 50cb3c88b11c0f3b7a000000 |