http://www.paho.org/English/AD/DPC/NC/guidelines.htm
http://www.paho.org/Spanish/AD/DPC/NC/guidelines.htm

It provides guidance on the creation of epidemiological surveillance systems on violence and injuries, using the definition and universally accepted concepts of epidemiological surveillance that have been applied to other types of public health problems to support knowledge, analysis, and decision-making about the control and prevention of these problems. Document in pdf format; Acrobat Reader required.