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  1. 1
    Published 1976
    [San Salvador] : [Ministerio de Trabajo y Previsión Social], [-1976]
    volumes.
  2. 2
    San Salvador, Repub́lica de El Salvador, Centro America : Ministerio de Salud Pública y Asistencia Social.
    volumes : illustrations.
  3. 3
    Published 1937
    [Caracas] Ministerio de Sanidad y Asistencia Social, 1937-
    volumes illustrations, tables (some folded) diagrams (some folded) 26-32 cm.
  4. 4
    Published 1945
    Lima, Perú : Imp. Torres Aguirre, S.A., 1945-
    v.
  5. 5
    Published 1941
    Lima : Imp. de la Comand, Gral. de AER, -1941.
    v.
  6. 6
    Published 1932
    Caracas, 1932-1936.
    volumes plates, tables (some folded) diagrams 32 cm.

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