1. Prevention and control of influenza;Recommendations of the Immunization Practices Advisory Committee (ACIP);MMWR,1986
2. Prevention and control of influenza;Recommendations of the Immunization Practices Advisory Committee (ACIP);MMWR,1986
3. Impact of influenza epidemics on mortality in the United States from October 1972 to May 1985;Lui;Am J Public Health,1987
4. Physician utilization;Eisenberg,1985
5. Attitudes and practices of private physicians related to influenza and pneumococcal immunization, 1980;Centers for Disease Control,1981