Half a century of medical and public health progress, 1890-1940
By: by Dr. Arístides A. Moll.  Fiftieth anniversary of the Pan American union, 1890 - April 14 - 1940
Publisher: Pan American Union
Published: 1940
Place of publication: Washington D.C
Language: eng
Number of pages: 17
Subjects: Medicine; Public health; Sanitary affairs
Notes: Cover-title.

At head of title: Pan American day, April 14.

Mimeographed.