Time allocation study.
| Egile nagusia: | |
|---|---|
| Egile korporatiboa: | , |
| Formatua: | Liburua |
| Hizkuntza: | English |
| Argitaratua: |
Athens
Athens Center of Ekistics
1968.
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| Saila: | ACE publication series. Research report no. 6
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| Gaiak: |