1. Shaanxi Provincial Bureau of Statistics: Shaanxi Statistical Yearbook. 2006, Beijing, 256-
2. Ma HZ, Liu GF: Observation of Tuberculosis Prevalence in Medical School. Chinese Journal of Tuberculosis and Respiratory Diseases. 1985, 8: 18-21. 60-61. (In Chinese)
3. Hu XR, Gao YP, Zhang ZL: Following up of Tuberculosis Infection of University Students. Chinese Journal of School Health. 1988, 19: 296-(In Chinese)
4. Zhang HC, Guo SZ: Preliminary Design of School Anti-tuberculosis Healthcare Education program. Modern Preventive Medicine. 1999, 26: 525-527. (In Chinese)
5. Yin YL: Analysis of Tuberculosis Outbreak in Two Schools in Baotou City. Chinese Journal of School Health. 1995, 16: 154-(In Chinese)