W. P. Cottam
发表
W. P. Cottam,
G. Stewart,
1940
.
W. P. Cottam,
1937,
Science.
W. P. Cottam,
1947
.
W. P. Cottam,
1954,
Journal of the Arnold Arboretum..
W. P. Cottam,
J. M. Tucker,
Rudy Drobnick,
1961
.
W. P. Cottam,
F. R. Evans,
1945
.
W. P. Cottam,
J. M. Tucker,
Rudy Drobnick,
1959
.
W. P. Cottam,
G. Stewart,
S. S. Hutchings,
1940
.