| LC control no. | n 83068684 |
|---|---|
| Personal name heading | Haenel, Ralph |
| Variant(s) | Haenel, R. Haenel, R. (Ralph) |
| Found in | Kappelmeyer, O. Geothermics ... 1974. His The Urach Geothermal project, 1982: t.p. (Ralph Haenel) |
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