1
by Beckmann, George M.
Published 1962
2
by Likhachev, Dmitrii Sergeevich.
Published 1991
3
Published 1981
4
by Ibn Khaldun.
Published 2000
5
6
by Scharfstein, Ben-Ami
Published 1974
7
8
Published 1989
9
10
11
12
13