(Reprint 727.) [1927, on cover, is date of previous reprint. Original article from Public health reports, Feb. 3, 1922.]
Notes:
(Reprint 727.) [1927, on cover, is date of previous reprint. Original article from Public health reports, Feb. 3, 1922.] * For Sale by Superintendent of Documents. Paper, 5c.
Availability:
* For Sale by Superintendent of Documents. Paper, 5c.