Close Relations' Correspondence
| Date | From | To | Lge | KPA / Src |
|---|---|---|---|---|
| 1956.01.04 | Conrad Arensberg | Rosemary Arnold | en | 49/05, 2 |
| 1964.10.21 | Felix Schafer | Ilona Duczyńska | de | 58/11, 4-6 |
| 1964.11.23 | Felix Schafer | Ilona Duczyńska and Kari Polanyi-Levitt | de | 58/11, 7-13 |
| 1966.04.08 | Felix Schafer | Ilona Duczyńska | de | 58/11, 15-16 |
| 1966.04.30 | Felix Schafer | Ilona Duczyńska | de | 58/11, 21-27 |
| 1967.02.20 | Felix Schafer | Ilona Duczyńska | de | 58/11, 28 |
| 1967.06.24 | Felix Schafer | Ilona Duczyńska | de | 58/11, 29-33 |
| 1967.08.22 | Felix Schafer | Ilona Duczyńska | de | 58/11, 39-41 |
| 1967.12.18 | Felix Schafer | Ilona Duczyńska | de | 58/11, 43-45 |
| 1968.01.10 | Felix Schafer | Ilona Duczyńska | de | 58/11, 46-47 |
| 1968.01.? | Felix Schafer (Translation comparing Böhm-Bawerk's Positive Theorie des Kapitals and The Positive Theory of Capital) |
Ilona Duczyńska | de/en | 29/11 |
| 1968.02.08 | Felix Schafer | Ilona Duczyńska | de | 58/11, 48 |
| 1968.06.24 | Felix Schafer | Ilona Duczyńska | de | 58/11, 51-53 |
| 1973.03.06 | Felix Schafer | Ilona Duczyńska | de | 58/11, 83-84 |
| 1973.04.24 | Felix Schafer | George Dalton | en | 55/05, 83-84 |
| 1974.08.03 | Felix Schafer | Ilona Duczyńska | 58/11, 93-94 | |
| 1974.08.11 | Ilona Duczyńska | Felix Schafer | de | 58/11, 96-97 |
| 1974.09.16 | Felix Schafer | Ilona Duczyńska | de | 58/11, 100-101 |
| 1978.07.25 | Felix Schafer | Kari Polanyi-Levitt | de | 58/12, 7-8 |