Frain, Hummel La Rue.
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- pdbooks.info ID: 61499
Hummel La Rue. Frain Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
|  |  | 
| ||||||
| An examination of earnings in certain standard machine-tool occupations in Philadelphia | 1929 | Author | |  | |  | | ||