1
by Gullick, J. M, 1916-
Published 1967
2
by Trager, Frank N.
Published 1966
3
by St. John, Ronald Bruce
Published 1992
4
by Seton-Watson, Hugh, 1916-1984
Published 1961
5
by Booker, Malcolm, 1915-
Published 1976
6
Published 1994
7
by Lenczowski, George
Published 1949
8
by Parkinson, F.
Published 1974
9
by Grasselli, Gabriella
Published 1996
10
Published 2000
11
12
by Lansford, Tom
Published 2006
13
by Cumings, Bruce
Published 1995
14
Published 1996
15
Published 1997
16
by Wong, Danny Tze-Ken
Published 1995
17
Published 1960
18
by Maude, George
Published 1976
19
by DeConde, Alexander
Published 1992
20
by Masih, Joseph R.
Published 1999