41
by Chapman, Elwood N.
Published 1986
...The Fifty-Minute series...
42
by Manning, Marilyn Jakad.
Published 1990
...Fifty-Minute series...
43
Published 2005
...Crisp fifty-minute series book....
44
by Conrad, Pamela J.
Published 1988
...A fifty-minute series book...
45
by Flanigan, Eileen M.
Published 1995
...A Crisp Fifty-Minute series...