| Paper | Date | Page | Article Title | Type | ||
|---|---|---|---|---|---|---|
| 1 |
 |
Helper Journal | 1944-05-25 | 1 | page | |
| 2 |
 |
Helper Journal | 1956-05-10 | 7 | page | |
| 3 |
 |
Helper Journal | 1963-05-23 | 8 | page | |
| 4 |
 |
Helper Journal | 1931-05-14 | 3 | page | |
| 5 |
 |
Helper Journal | 1935-05-24 | 2 | page | |
| 6 |
 |
Helper Journal | 1941-05-22 | 1 | page | |
| 7 |
 |
Helper Journal | 1943-05-20 | 1 | page | |
| 8 |
 |
Helper Journal | 1950-05-11 | 2 | page | |
| 9 |
 |
Helper Journal | 1951-05-17 | 6 | page | |
| 10 |
 |
Helper Journal | 1933-05-12 | 7 | page | |
| 11 |
 |
Helper Journal | 1941-05-08 | 2 | page | |
| 12 |
 |
Helper Journal | 1940-05-02 | 1 | page | |
| 13 |
 |
Helper Journal | 1945-05-17 | 1 | page | |
| 14 |
 |
Helper Journal | 1933-05-19 | 3 | page | |
| 15 |
 |
Helper Journal | 1932-05-05 | 1 | page |