31
by Araneta, Salvador
Published 1976
Book
32
by Agoncillo, Teodoro A.
Published 1974
Book
33
34
35
by Benitez, Tomas C.
Published 1972
Book
36
by Finkle, Jason Leonard 1926-
Published 1971
Book
37
by Miliband, Ralph
Published 1969
Book
39
by Sison, Jose Maria
Published 1967
Book
40