De Grief, Roy, 1896–
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- Open Library: OL2275935A
- pdbooks.info ID: 176470
Roy De Grief Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
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| On your toes, officers!: Facts about police work every law enforcement officer should know | 1953 | Author | |  | |  | | 
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