De Graff, Mark H., 1890–
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- pdbooks.info ID: 42119
Mark H. De Graff Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
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| Objective examination methods in the social studies: a report of investigations carried out under a subvention from the New York Commonwealth fund | 1926 | Author | |  | |  | | 
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