Walsh, Julia A.; Kenneth S. Warren (1980). "Selective primary health care: An interim strategy for disease control in developing countries". Social Science & Medicine. Part C: Medical Economics. 14 (2): 145–63. doi:10.1016/0160-7995(80)90034-9. PMID7403901.
Walsh, Julia A.; Kenneth S. Warren (1980). "Selective primary health care: An interim strategy for disease control in developing countries". Social Science & Medicine. Part C: Medical Economics. 14 (2): 145–63. doi:10.1016/0160-7995(80)90034-9. PMID7403901.