| LC control no. | no 97046671 |
|---|---|
| Personal name heading | Ertel, Hans, 1904-1971 |
| Found in | Ertel's potential vorticity, 1997: p. 5, etc. (Hans Ertel; d. 1971) LC database, Aug. 5, 1997 (hdg.: Ertel, Hans, 1904- ) Brockhaus Enzyk., 19. Aufl. (Ertel, Hans; b. Berlin Mar. 24, 1904; d. East Berlin July 2, 1971; geophysicist and meteorologist) |
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