| URL | Title | Id |
|---|---|---|
| http://digfir-published.macmillanusa.com/calc_tutorial/calc_tutorial_3_9_031.html | Chapter 1. | 5021a280b11c0f1708000000 |
| http://digfir-published.macmillanusa.com/calc_tutorial/calc_tutorial_3_9_031_dlap.xml | DLAP questions | 5021a280b11c0f1708000000 |