Nuclear War Survival Skills (archive.org) Cresson H. Kearny, Nuclear War Survival Skills, Oregon Institute of Science and Medicine, 1987 revised edition. May be freely distributed (see copyright page).
Nonagon (Wikipedia) In geometry, a nonagon (/ˈnɒnəɡɒn/) or enneagon (/ˈɛniəɡɒn/) is a nine-sided polygon or 9-gon.