Mga produkto mula sa gatas isang courseware ng Technology Correspondence Program, Technology and Livelihood Resource Center
| Awduron Corfforaethol: | , |
|---|---|
| Awduron Eraill: | |
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
Makati City
The Center
1989.
|
| Pynciau: |