Ray, Harold B.
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- pdbooks.info ID: 9473
Harold B. Ray Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
|  |  | 
| ||||||
| Preparatory mathematics for the building trades | 1927 | Author | |  | |  | | ||
| Preparatory mathematics for use in technical schools | 1921 | Author | | | |  | | 
| |