XM21 Remote Sensing Chemical Agent Alarm (RSCAAL) : A passive infrared device used to detect and identify chemical agent clouds. It can perform reconnaissance and point or area surveillance missions
US Army Center for Health Promotion and Preventive Medicine CHPPM, TG 204 Glossary of Terms For Nuclear, Biological, and Chemical Agents And Defense Equipment (Section 5 - Chemical Terms), MD, USA 2001. http://www.au.af.mil/au/awc/awcgate/army/tg204.pdf , (DfnsEqu/Chem - Amer) {490}
Madison County North Carolina Government, Madison County Emergency Operations Plan Glossary (Section 5: Chemical Terms), NC, USA 2009. http://www.madisoncountync.org/eop/Madison_EOP_PDF /Glossary.pdf, (CBRNEmr - Amer) {877}