RT Article T1 Equal but separate? A cross-national study of sex segregation in higher education JF American sociological review VO 67 IS 4 SP 573 OP 599 A1 Charles, Maria 1960- A2 Bradley, Karen LA English YR 2002 UL https://krimdok.uni-tuebingen.de/Record/1639542027 K1 Schule K1 Geschlechtertrennung