| URL | Title | Id |
|---|---|---|
| http://digfir-published.macmillanusa.com/calc_tutorial/calc_tutorial_15_4_017.html | Chapter 1. calc_tutorial_15_4_017 | 50c736dfb11c0f2561000000 |
| http://digfir-published.macmillanusa.com/calc_tutorial/calc_tutorial_15_4_017_dlap.xml | DLAP questions | 50c736dfb11c0f2561000000 |