1. Statistical Abstract of the United States,1980
2. Statistical Abstract of the United States,1980
3. Strangulation as a method of homicide;Luke;Arch Pathol,1967
4. Studies on 101 cases of death due to hanging;Sen Gupta;J Indian Med Assoc,1965
5. Asphyxial deaths by hanging in New York City, 1964–1965;Luke;J Forensic Sci,1967