2
3
by Cheibub, Jose Antonio
Published 2007
Book
4
by Katigbak, Jose
Published in Philippine Star (2004)
Article
5
by Strom, Kaare
Published 1990
Book
6
Published 1989
Book
7
by Seligman, Lester G.
Published 1989
Book
8
9
10
by Dodd, Lawrence C. 1946-
Published 1976
Book
11
12
13
14
by Riker, William H
Published 1962
Book
15
by Riker, William H
Published 1962
Book