RT Journal Article SR Electronic T1 The Analysis of Racial Descent in Animals JF Science JO Science FD American Association for the Advancement of Science SP 173 OP 176 DO 10.1126/science.24.606.173 VO 24 IS 606 A1 CONKLIN, E. G. YR 1906 UL http://science.sciencemag.org/content/24/606/173.abstract AB