B. Willard
发表
B. Willard,
1935,
Science.
C. W. Merriam,
G. A. Cooper,
G. H. Chadwick,
1942
.
B. Willard,
1924,
Science.
G. H. Ashley,
B. Willard,
1935,
Science.
B. Willard,
1935
.
R. Moore,
J. Weller,
J. S. Williams,
1948
.
B. Willard,
1940,
Science.
B. Willard,
1937
.
B. Willard,
1935
.
B. Willard,
1936,
The Journal of Geology.
B. Willard,
1935
.
B. Willard,
1940
.
B. Willard,
1961
.
B. Willard,
1957
.
B. Willard,
1935
.
B. Willard,
1955
.
B. F. Howell,
B. Willard,
H. Roberts,
1950
.
A. B. Cleaves,
B. Willard,
1939
.
B. Willard,
1933
.
A. B. Cleaves,
B. Willard,
1930
.