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| Pharmaceutical industry--Management (2) |
| Pharmaceutical industry--Quality control (2) |
| Polytechnic University of Puerto Rico--Graduate students--Research (2) |
| Drug factories--Equipment and supplies--Cleaning (1) |
| Human engineering (1) |
| Industrial hygiene (1) |
| Medical instruments and apparatus--Sterilization (1) |
| Pharmaceutical technology--Quality control (1) |