Junior statistician prepartory problems and questions and a full length practice test for civil service examinations .
| Awdur Corfforaethol: | |
|---|---|
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
Milwaukee,Wis.
Pergande Pub.
1942.
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| Pynciau: |