RT Article T1 Immigrant enclaves and ethnic communities in New York and Los Angeles JF American sociological review VO 67 IS 2 SP 295 OP 322 A1 Logan, John R. A1 Alba, Richard D. 1942- A1 Zhang, Wenquan LA English YR 2002 UL https://krimdok.uni-tuebingen.de/Record/1639569464 K1 USA K1 Immigration K1 Meinde K1 Assimilation