Peter Ruoro
| Thumbnail | Title | Description |
|---|---|---|
 |
Chemchemi Newsletter, no. 5, August 1964 | |
 |
Chemchemi Newsletter, no. 8, November 1964 |
| Thumbnail | Title | Description |
|---|---|---|
|
|
Chemchemi Newsletter, no. 5, August 1964 | |
|
|
Chemchemi Newsletter, no. 8, November 1964 |