21
22
23
by Cloninger, Susan C.
Published 1996
24
by Hauck, Paul Dr.
Published 1995
25
Published 1996
26
27
by Feldman, Robert S.
Published 1997
28
by Lahey, Benjamin B.
Published 1998
29
by Lefton, Lester A., 1946-
Published 1997
30
31
32
33
by Hansen, Mark Victor
Published 1995
34
by Shaffer,David R.
Published 1996
35
by Craig, Grace J.
Published 1996
36
37
by Pratley,Peter
Published 1995
38
39
by Wortman, Camille B.
Published 1999
40
by Hoffman, Lois
Published 1994