Frank R. Spellman is Assistant Professor of Environmental Health at Old Dominion University and the author of more than fifty books, including Water Infrastructure Protection and Homeland Security (GI, 2007) and Food Supply Protection and Homeland Security (GI, 2008).

Revonna M. Bieber works for the Naval Medical Center Portsmouth in the field of industrial hygiene. She is coauthor, with Frank Spellman, of Occupational Safety and Health Simplified for the Chemical Industry (GI, 2009) and Occupational Safety and Health Simplified for the Food Manufacturing Industry (GI, 2007).