The number combinations, their relative difficulty and the frequency of their appearance in text-books,
Gorde:
| OCLC: | 4285002 |
|---|---|
| Egile nagusia: | |
| Beste egile batzuk: | |
| Hizkuntza: | English |
| Argitaratua: |
Madison, Wis.
[1924]
|
| Saila: | University of Wisconsin. Bureau of Educational Research. Bulletin no. 2. July 1924.
|
| Gaiak: | |
| Formatua: | Monograph Note that CRL will digitize material from the collection when copyright allows. |