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Nd |
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1983 |
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Nd |
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1969 |
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Nd |
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Nd |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 3 |
1960 |
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Westphalian B |
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Poland |
DybovЎ,S. et al. Microspores of the Upper Silesian Coal Measures. |
1957 |