Official websites use .gov A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Light green background with black lettering. Illustration consists of a chart with columns of data for different geographic areas. Some information is provided below the table, which elaborates on the column headings and lists notes and sources. A logo is in the upper left-hand corner.
Copyright:
The National Library of Medicine believes this item to be in the public domain. (More information)
Extent:
1 photomechanical print (poster) : 34 x 56 cm.
Provenance:
Gift; Johns Hopkins University, Center for Communication Programs; 2002; 02-05.