RT Article T1 Adolescent self-concept: testing the assumption of equivalent structure across gender JF American educational research journal VO 24 IS 3 SP 365 OP 387 A1 Byrne, Barbara M. 1935- LA English YR 1987 UL https://krimdok.uni-tuebingen.de/Record/1642800600 K1 Selbstkonzept K1 Heranwachsende