Douglass, Harl R. (Harl Roy), 1892–1972
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- Open Library: OL2612747A
- pdbooks.info ID: 175160
Harl R. (Harl Roy) Douglass Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
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| Teaching in high school | 2d ed. | 1957 | Author | |  | |  | | 
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