Simpson, Herbert D. (Herbert Downs), 1879–
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- Open Library: OL2266927A
- pdbooks.info ID: 162614
Herbert D. (Herbert Downs) Simpson Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
|  |  | 
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| Highway finance | 1951 | Author | |  | |  | | 
| |