R. Shaffer
发表
R. Shaffer,
1975
.
B. Jaffee,
R. Shaffer,
M. B. Harrison,
1987,
Journal of nematology.
L. R. Hesler,
R. Shaffer,
1960
.
R. Shaffer,
1965,
Mycologia.
M. G. Weaver,
R. Shaffer,
1965
.
R. Shaffer,
1990
.
R. Shaffer,
1972
.
R. Shaffer,
1957
.
R. Shaffer,
1962
.
R. Shaffer,
R. L. Homola,
1975
.
R. Shaffer,
1962,
Brittonia.
D. E. Stuntz,
R. Shaffer,
M. McKenny,
1971
.
R. Shaffer,
1964
.
C. Rogerson,
R. Shaffer,
1952
.
R. Shaffer,
1970,
Brittonia.
J. F. Thomson,
R. J. Hasterlik,
J. Katz,
1958
.
R. Shaffer,
G. Pride,
1977,
Obstetrics and gynecology.
J. Katz,
H. Crespi,
R. Shaffer,
1957,
Botanical Gazette.