PASSIVE AIR DEFENCE SITE
- Sites, buildings or structures involved in passive air defence, usually by forcing hostile aircraft to fly high or drop their bombs on the wrong targets. Use more specific term.
- English Heritage
- http://creativecommons.org/licenses/by/3.0 (FISH Thesaurus of Monument Types)
- http://www.english-heritage.org.uk (FISH Thesaurus of Monument Types)
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