Research memorandum on migration differentials /
Thomas, Dorothy Swaine
Research memorandum on migration differentials / by Dorothy Swaine Thomas ; with contributions by Rudolf Heberle ... [et al.] - New York : Social Science Research Council, 1938 - 423 p. : ill. ; 23 cm. - Bulletin / Social Science Research Council ; 43 . - Bulletin (Social Science Research Council) ; 43 .
Research memorandum on migration differentials / by Dorothy Swaine Thomas ; with contributions by Rudolf Heberle ... [et al.] - New York : Social Science Research Council, 1938 - 423 p. : ill. ; 23 cm. - Bulletin / Social Science Research Council ; 43 . - Bulletin (Social Science Research Council) ; 43 .