E. Sandgren
发表
E. Sandgren,
K. M. Ragsdell,
1974
.
E. Sandgren,
1970
.
E. Sandgren,
Y. Wang,
1990
.
E. Sandgren,
Mohamed El Sayed,
1988
.
E. Sandgren,
K. M. Ragsdell,
G. Gim,
1985
.
E. Sandgren,
K. M. Ragsdell,
K. Ragsdell,
1982
.
E. Sandgren,
K. M. Ragsdell,
K. M. Ragsdell,
1980
.
E. Sandgren,
樋口 金次郎,
1976
.
E. Sandgren,
M. P. Iannuzzi,
E. Sandgren,
1996
.
E. Sandgren,
A. S. Hall,
A. S. Hall,
1977
.
E. Sandgren,
E. Sandgren,
1990
.
E. Sandgren,
M.A. Palmer,
R.A. Heinz,
1998,
FIE '98. 28th Annual Frontiers in Education Conference. Moving from 'Teacher-Centered' to 'Learner-Centered' Education. Conference Proceedings (Cat. No.98CH36214).
E. Sandgren,
R. L. West,
1989
.
E. Sandgren,
R. L. West,
E. Sandgren,
1990
.
E. Sandgren,
K. M. Ragsdell,
G. A. Gabriele,
1975
.