1. http://encyclopedia.fablis.com/index.php/Use_of_poison_gas_in_World_War_I.
2. http://encyclopedia.fablis.com/index.php/Iran-Iraq_War
3. Jane’s Information Group, Jane’s Chem-Bio Handbook, 1340 Braddock Place, Suite 300, Alexandria, VA 22314–1651, Quick Reference.
4. Jane’s NBC Protection Equipment,1990
5. http://www.nbcindustrygroup.com/handbook/pdf/AGENT_CHARACTERISTICS.pdf, p. VI.