| http://digfir-published.macmillanusa.com/hm_custom_osu/hmosu_lab1_scientificmeasurements_f13.html | Chapter 14. Scientific Measurements
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| http://digfir-published.macmillanusa.com/hm_custom_osu/hmosu_lab1_scientificmeasurements_f13_dlap.xml | DLAP questions | 51f14acdb62f8b2c5a000004 |