www.google.com/maps/d/edit?mid=1hRCQKQTLTGAMrm2Sk7T8rVQCc6ywRvA&usp=sharing .... zerg90 map of fire stations in Calgary created May 31 2022
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http://www.usfa.fema.gov/pdf/efop/efo42281.pdf - 2008 analysis of Fire Department response capability versus NFPA 1710