1
by Shaffer, Lawrence B., Krug, Ronald S.
Published 1996
Springer New York

2
by Krug, Ronald S., Cass, Alvah R.
Published 1995
Springer New York

3
by Krug, Ronald S., Cass, Alvah R.
Published 1987
Springer New York

4
by Krug, Ronald S., Cass, Alvah R.
Published 1992
Springer New York

5
by Krug, Ronald S., Cass, Alvah R.
Published 1989
Springer New York

6
by Shaffer, L. Blaine, Krug, Ronald S.
Published 1993
Springer New York