Polio : the beginning of the end /
Polio : the beginning of the end /
World Health Organisation.
- Geneva : WHO , 1997.
- ix, 100p. : ill ; 25 cm.
Poliomyelitis.
614.549
WHO WC555 / P579 1997.
Poliomyelitis.
614.549
WHO WC555 / P579 1997.