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  2. Nuclear War Survival Skills - Wikipedia

    en.wikipedia.org/wiki/Nuclear_War_Survival_Skills

    Nuclear War Survival Skills or NWSS, by Cresson Kearny, is a civil defense manual. It contains information gleaned from research performed at Oak Ridge National Laboratory during the Cold War , as well as from Kearny's extensive jungle living and international travels.

  3. Polyvinyl chloride - Wikipedia

    en.wikipedia.org/wiki/Polyvinyl_chloride

    At 1.4 g/cm 3, PVC's density is also higher than structurally related plastics such as polyethylene (0.88–0.96 g/cm 3) and polymethylmethacrylate (1.18 g/cm 3). Producers [ edit ]

  4. The Economist Democracy Index - Wikipedia

    en.wikipedia.org/wiki/The_Economist_Democracy_Index

    Each answer is converted to a score, either 0 or 1, or for the three-answer questions, 0, 0.5 or 1. With the exceptions mentioned below, within each category, the scores are added, multiplied by ten, and divided by the total number of questions within the category.