TY - BOOK TI - Poliomyelitis eradication: field guide SN - 9275116075 U1 - 614.549 PY - 2006/// CY - Washington, D.C. PB - Pan American Health Organization KW - POLIOMYELITIS KW - Poliomyelitis-prevention and control KW - Mass Vaccination KW - Poliomyelitis-epidemiology KW - Poliovirus vaccines KW - Immunization UR - http://apps.who.int/iris/handle/10665/166226 ER -