| LC control no. | n 79057665 |
|---|---|
| Personal name heading | Pongratz, Ludwig A., 1948- |
| Found in | His Zur Kritik kybernet. Methodolog. in d. Pädag., 1978: t.p. (Ludwig A. Pongratz) p. 4 of cover (b. 1948 in Siegen-Eiserfeld; Dr. Paed.) |
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