** [http://training.fema.gov/IS/searchIS.asp?keywords=PDS FEMA Independent Study Program (ISP)] Professional Development Series
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** FEMA [http://www.fema.gov/good_guidance/download/10260 "Planning Guidance for Protection and Recovery Following Radiological Dispersal Device (RDD) and Improvised Nuclear Device (IND) incidents"]
* [http://www.disasterengineer.org/library/FOG4e-1005.pdf FEMA Field Operations Guide]{{Dead link|date=July 2011}} Including descriptions of markings on evacuated and searched buildings
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* [http://www.femaanswers.org/ FEMAanswers.org] - wiki site set up to help Katrina victims