1. Recommended immunization schedules for persons aged 0-18 years-United States, 2007;Centers for Disease Control Prevention;MMWR Recommendations and Reports,2007
2. US Department of Health and Human Services. Health People 2010: National Health Promotion and Disease Prevention Objectives, Washington, DC, 2000.
3. The impact of record scattering on the measurement of immunization coverage;Stokley;Pediatrics,2001
4. Fragmentation of immunization history among providers and parents of children in selected underserved areas;Yusuf;American Journal of Preventive Medicine,2002
5. Notice to Readers Recommended Childhood Immunization Schedule-United States, January 1995;Centers for Disease Control Prevention;Morbidity and Mortality Weekly Report,1995