| Paper | Date | Page | Article Title | Type | ||
|---|---|---|---|---|---|---|
| 201 |
 |
Helper Journal | 1971-02-18 | 1 | page | |
| 202 |
 |
Helper Journal | 1972-02-03 | 1 | page | |
| 203 |
 |
Helper Journal | 1972-02-03 | 4 | page | |
| 204 |
 |
Helper Journal | 1973-02-01 | 3 | page | |
| 205 |
 |
Helper Journal | 1973-02-22 | 2 | page | |
| 206 |
 |
Helper Journal | 1975-02-12 | 1 | page | |
| 207 |
 |
Helper Journal | 1975-02-26 | 1 | page | |
| 208 |
 |
Helper Journal | 1976-02-04 | 1 | page |