Volume & Issue: Volume 19, Issue 2, December 1975 
| 1 | Some Considerations Affecting the Design of Follow-Up Studies | |
| Page 121-142 | ||
| Mindel C. Sheps; Ahmed Fathy Mahmoud Mustafa | ||
| 1 | Some Considerations Affecting the Design of Follow-Up Studies | |
| Page 121-142 | ||
| Mindel C. Sheps; Ahmed Fathy Mahmoud Mustafa | ||
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