Differentials in internal migration ...
By: [by] Albert Hoyt Hobbs.
Published: 1942
Place of publication: Philadelphia
Language: eng
Number of pages: 122
Subjects: Migration, Internal -- United States.; Unemployed -- United States.; United States -- Population.; United States -- Social conditions.
Notes: Thesis (Ph.D.)--University of Pennsylvania, 1941.

Bibliography: p. 119-122.