RT Journal Article SR Electronic T1 Who are the Tibetans? JF Science JO Science FD American Association for the Advancement of Science SP 708 OP 711 DO 10.1126/science.347.6223.708 VO 347 IS 6223 A1 Qiu, Jane YR 2015 UL http://science.sciencemag.org/content/347/6223/708.abstract AB