"Nerve Agents"(PDF). www.sjcphs.org. San Joaquin County Public Health Services. Archived from the original(PDF) on December 11, 2015. Retrieved December 26, 2015.
"Nerve Agents"(PDF). www.sjcphs.org. San Joaquin County Public Health Services. Archived from the original(PDF) on December 11, 2015. Retrieved December 26, 2015.