| URL | Title | Id |
|---|---|---|
| http://digfir-published.macmillanusa.com/calc_tutorial/calc_tutorial_3_4_21.html | Chapter 1. | 4fc296dcb11c0f762a000005 |
| http://digfir-published.macmillanusa.com/calc_tutorial/calc_tutorial_3_4_21_dlap.xml | DLAP questions | 4fc296dcb11c0f762a000005 |