Designing surveys a guide to decisions and procedures
| Prif Awdur: | |
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| Awduron Eraill: | |
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
Thousand Oaks, Calif.
Pine Forge Press
c1996.
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| Cyfres: | The Pine Forge Press series in research methods and statistics
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| Pynciau: |