RT Article T1 Durable effects of concentrated disadvantage on verbal ability among African-American children JF Proceedings of the National Academy of Sciences of the United States of America VO 105 IS 3 SP 845 OP 852 A1 Sampson, Robert J. 1956- A2 Raudenbush, Stephen 1946- A2 Sharkey, Patrick LA English YR 2008 UL https://krimdok.uni-tuebingen.de/Record/1912524619 DO 10.1073/pnas.0710189104