Preliminary screening procedures and criteria for replacements for halons 1211 and 1301 / Richard G. Gann, John D. Barns, Sanford Davis, Jonice S. Harris, Richard H. Harris Jr., John T. Herron, Barbara C. Levin, Frederick I. Mopsik, Kathy A. Notarianni, Marc R. Nyden, Maya Paabo, Richard E. Ricker