1
Available via Credo Reference
eBook
2
Available via Credo Reference
eBook
3
Published 2006
Available via EBSCO eBook Collection
eBook
4
by Rossum, Ralph A., 1946-
Published 1999
Book
5
Published 2006
Available via EBSCO eBook Collection
eBook
7
by Rossum, Ralph A., 1946-
Published 2013
Available via EBSCO eBook Collection
eBook
8
by Tarr, G. Alan
Published 1998
Available via JSTOR
eBook