R. Firth
发表
R H Firth,
R. Firth,
1891,
British medical journal.
Robert Firth,
R. Firth,
1923,
The Classical Review.
R. H. Firth,
R. Firth,
1914,
Physics Subject Headings (PhySH).
A. Macfadyen,
R. Firth,
1906
.
R. Firth,
1912
.
R. Firth,
1912
.
R. Firth,
1915
.