261
by Ibrahim Syukri
Published 2005
262
by Eisenstein
Published 2004
263
by Smith
Published 1958
264
265
Published 1970
266
by Mehrotra
Published 1965
267
by Moon
Published 1961
268
by Gibb
Published 1962
269
by Brockelmann
Published 1949
270
Published 1995
271
by Levy
Published 1962
272
by Coupland
Published 1945
273
by Halliday
Published 1974
274
Published 2002
275
by Black
Published 1968
276
by Meisel
Published 1962
277
278
by Davis
Published 1962
279
by Crozier
Published 1973
280
Published 2005