| http://digfir-published.macmillanusa.com/hm_custom_osu/hmlsu_wischusen_f13_appendixc.html | Chapter 2. Scientific Method and Experimental Design
| 51e6b558b62f8b3218000018 |
| http://digfir-published.macmillanusa.com/hm_custom_osu/hmlsu_wischusen_f13_appendixc_dlap.xml | DLAP questions | 51e6b558b62f8b3218000018 |