00826cam a2200277 a 4500 ocm20631848 1999080500000000 860421s1985 sa 000 0 eng d 9780796902900 0796902909 (pbk) sab86024103 eng eng afreng 153.9462 19 Epstein, Barbara I. Factors related to mechanical aptitude in Blacks. Pretoria : Human Sciences Research Council, 1985. vii, 124 p. Report PERS ; 380 Bibliography: p. 86-124. Mechanical ability. Blacks Intelligence levels. Blacks South Africa. Human Sciences Research Council. National Institute for Personnel Research. 758 758 0 0 ddc 0 0 DAPA DAPA 2017-05-31 I 0 153.94 EPS APA070944 2017-05-31 1 2017-05-31 BK 0 0 ddc 0 0 DAPA DAPA 2017-06-22 II 0 153.94 EPS APA071260 2017-06-22 1 2017-06-22 BK