6
by Toynbee, Arnold, 1889-1975.
Published 1962
Book
7
by Zea, Leopoldo, 1912-2004.
Published 1970
Book
10
by Verrill, A. Hyatt 1871-1954.
Published 1953
Book
11
Book
17
by Bailey, Gauvin A.
Published 2005
Book
18
Published 1969
Book
19
by Madariaga, Salvador de, 1886-
Published 1986
Book