The number combinations, their relative difficulty and the frequency of their appearance in text-books,
محفوظ في:
| OCLC: | 4285002 |
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| المؤلف الرئيسي: | |
| مؤلفون آخرون: | |
| اللغة: | English |
| منشور في: |
Madison, Wis.
[1924]
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| سلاسل: | University of Wisconsin. Bureau of Educational Research. Bulletin no. 2. July 1924.
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| الموضوعات: | |
| التنسيق: | Monograph Note that CRL will digitize material from the collection when copyright allows. |