R. Ryder
发表
P. David Pearson,
Randall J. Ryder,
R. Ryder,
1980
.
Michael F. Graves,
Randall J. Ryder,
R. Ryder,
1980
.
Michael F. Graves,
R. Ryder,
1994,
The Elementary School Journal.
R. Ryder,
1985
.
R. Ryder,
K. Wilcox,
2002
.
R. Ryder,
Mary A. Medo,
1993
.
Randall J. Ryder,
Wayne H. Slater,
R. Ryder,
1988
.
R. Ryder,
1981
.
R. Ryder,
1982
.
Randall J. Ryder,
R. Ryder,
Jennifer Lyn Burton,
2006
.
M. Mir,
R. Ryder,
E. A. Freeman,
1999
.
R. Ryder,
E. A. Freeman,
2003
.
Michael F. Graves,
R. Ryder,
1980
.
Randall J. Ryder,
R. Ryder,
1979
.
Randall J. Ryder,
R. Ryder,
Melody Hughes,
1985
.