00680nam 220018100 450 3182788http://id.bnportugal.gov.pt/bib/porbase/31827880-691-02469-3fo003_bc.iso/06-12-2021/2040110909_BIBLIO20120209d1987 k y0porb0103 baengGB<The >Tibetan Empire in Central AsiaA History of the Struggle for Great Power among Tibetans, Turks, Arabs, and Chinese during the Early Middle AgesChristopher I. BeckwithPrincetonPrinceton University Press1987xxii, 281 p.; 22 cm94(57)BNporBeckwithChristopher I.PTFO20120209RPCFOFOTIB 94 BEC,C.