| Tatjana J. van Vark |
| HOME | Back to Harmonium | INDEX |
|
| The drum to hold the graph to be analyzed and to record the results |
|
|
| Tatjana J. van Vark |
| HOME | Back to Harmonium | INDEX |
|
|
| The drum to hold the graph to be analyzed and to record the results |
|
|
|