1
BOOK
2
by Waller, Gary F. 1945-
Published 1980
BOOK
3
by Conn, Peter J.
Published 2009
BOOK
5
by Mason, Jeffrey D. 1952-
Published 1993
Available via EBSCO e-books
8
9
Published 2010
Available via EBSCO e-books
12
13
by Douglas, George H., 1934-
Published 1983
Available via JSTOR
15
by Brioso Santos, Héctor.
Published 2006
Available via ProQuest