Freeman, Donald B.
International trade migration, and capital flows : a quantitative analysis of spatial economic interaction .-- Chicago : University , 1973
.--XIV, 201 p. 23 cm. .-- ( University of Chicago. Research paper ; 146 ).
International trade migration, and capital flows : a quantitative analysis of spatial economic interaction .-- Chicago : University , 1973
.--XIV, 201 p. 23 cm. .-- ( University of Chicago. Research paper ; 146 ).