| http://digfir-published.macmillanusa.com/hm_custom_osu/hmlsu_wischusen_f13_references.html | Chapter 2. References
| 51e94bafb62f8b7558000001 |
| http://digfir-published.macmillanusa.com/hm_custom_osu/hmlsu_wischusen_f13_references_dlap.xml | DLAP questions | 51e94bafb62f8b7558000001 |