(Q39417913)
Statements
1 reference
Residual paralytic poliomyelitis in a tropical region of Brazil, 1969-1977: prevalence surveys in different age groups as indicators of changing incidence (English)
1 reference
Sabin AB
1 reference
Silva E
1 reference
1 February 1983
1 reference
1 reference
117
1 reference
2
1 reference
193-200
1 reference
Identifiers
1 reference
1 reference