International economic conference, Geneva, May 1927 : documentation : natural movement of populations during the first quarter of the twentieth century /
League of Nations. Economic and Financial Section.
- Geneva : League of Nations, 1927.
- 7 p. in various pagings : ill., maps ; 27 cm.
- League of Nations ll. Economic and financial 1926, ll. 61. .
Includes bibliographical references.
Economics.
330.6 / LEI
Includes bibliographical references.
Economics.
330.6 / LEI