RT Journal Article SR Electronic T1 Endocranial Capacity of Early Hominids JF Science JO Science FD American Association for the Advancement of Science SP 9 OP 9 DO 10.1126/science.283.5398.9b VO 283 IS 5398 A1 Lockwood, Charles A. A1 Kimbel, William H. YR 1999 UL http://science.sciencemag.org/content/283/5398/9.2.abstract AB