R. Cope
发表
A. Penn,
R. Cope,
1968
.
Robert G. Cope,
R. Cope,
1987
.
R. Cope,
1981
.
R. Cope,
1981
.
H. Goldsmid,
R. Cope,
1965
.
P. Moser,
H. Bilger,
R. Cope,
1969
.
A. Penn,
R. Cope,
R G Cope,
1968
.
R. Cope,
1972
.
R. Cope,
1978
.
R. Cope,
1985
.
Revolving college doors: The causes and consequences of dropping out, stopping out, and transferring
William Hannah,
Robert G. Cope,
R. Cope,
1975
.
H. Bullard,
R. Cope,
C. Boyd,
1981,
The Lancet.
R. Cope,
1971
.
R. Cope,
1978
.
R. Cope,
G. Delaney,
1991
.
R. Cope,
1970
.