RT Article T1 Differential psychology before and after William Stern JF Psychologische Beiträge VO 32 IS 3/4 SP 249 OP 262 A1 Eysenck, Hans Jürgen 1916-1997 LA English YR 1990 UL https://krimdok.uni-tuebingen.de/Record/1640226184 K1 Differentielle Psychologie