The positive contribution by immigrants :  a symposium / 
prepared for Unesco by the International Sociological Association and the International Economic Association ; Oscar Handlin [i 7 pozostałych]. 
 - 2nd impression. 
 - Paris :  Unesco,  1960. 
 - 199, [1] strona ;  22 cm. 
 - Population and Culture .
 - Population and Culture .
<br/><br/>Indeks. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Emigracja i imigracja--wpływ--konferencje.