De Groat, Harry De Witt.
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- pdbooks.info ID: 37478
Harry De Witt. De Groat Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
|  |  | 
| ||||||
| The Iroquis arithmetics for school and life | 1926 | Author | |  | |  | | ||
| The Iroquois arithmetics for school and life | 1926 | Author | | | | | | ||