| Biographical: Short biography - K. H. Stahmer: Biographical notes on Bertold Hummel - Pictures
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| 1967 | 1972 | 1973 | 1978 |
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| 1980 | 1982 | 1988 | 1993 |
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| 1994 | 1998 | 2000 | The Hummel Family (2002) |
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You can download pictures of Bertold Hummel for publication here ... | |||