Papers presented and discussions held.
Contributors: Pan American Health Organization.; World Health Organization.
Series: Pan American Sanitary Bureau. Scientific publication no. 50; Publicaciones científicas (Washington, D.C.) ;; no. 50.
Publisher: Pan American Health Organization, Pan American Sanitary Bureau
Published: 1960
Place of publication: Washington
Language: eng
Number of pages: 634
Subjects: Poliomyelitis vaccine -- Congresses.
Other titles: Live poliovirus vaccines.
Notes: Includes bibliographies.
On cover: Live poliovirus vaccines.
"Sponsored by the Pan American Health Organization and the World Health Organization, with the cooperation of the Sister Elizabeth Kenny Foundation."