Diphtheria
Reading edition
How to Recognize the Disease
How to Keep from Catching It
How to Treat Those Who Do Catch It
KEEP WELL SERIES No. 4
TREASURY DEPARTMENT UNITED STATES PUBLIC HEALTH SERVICE 1919
GOVERNMENT PRINTING OFFICE
Reading edition
How to Recognize the Disease
How to Keep from Catching It
How to Treat Those Who Do Catch It
KEEP WELL SERIES No. 4
TREASURY DEPARTMENT UNITED STATES PUBLIC HEALTH SERVICE 1919
GOVERNMENT PRINTING OFFICE