EN 
| Letter | Year |
|---|---|
| July 1960 – VOL. 41, No. 5 – Safety is a Personal Thing | July 1960 |
| May 1960 – VOL. 41, No. 4 – The Relationship of Man and Nature | May 1960 |
| April 1960 – VOL. 41, No. 3 – On Following Through | April 1960 |
| March 1960 – VOL. 41, No. 2 – On Small Business Management | March 1960 |
| February 1960 – Vol. 41, No. 1 – In Search of Health | February 1960 |
| November 1959 – Vol. 40, No. 9 – Why Procrastinate? | November 1959 |
| October 1959 – Vol. 40, No. 8 – Building a Better Community | October 1959 |
| September 1959 – Vol. 40, No. 7 – About Trying Experiments | September 1959 |
| August 1959 – VOL. 40, NO. 6 – The Farm Way of Life | August 1959 |
| July 1959 – Vol. 40, No. 5 – Education for Success in Business | July 1959 |