%0 Book %T Growing Vulnerability of the Public Switched Networks: Implications for National Security Emergency Preparedness %D 1989 %U https://nap.nationalacademies.org/catalog/10330/growing-vulnerability-of-the-public-switched-networks-implications-for-national %> https://nap.nationalacademies.org/catalog/10330/growing-vulnerability-of-the-public-switched-networks-implications-for-national %I The National Academies Press %C Washington, DC %G English %K Computers and Information Technology %P 132 %R doi:10.17226/10330