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Leuschner R.(1981)Pollen and inorganic particles in the air of climatically very different places in Switzerland Grana 20 161-167
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Boehm G.(1995)Atmospheric birch ( Grana 34 51-57
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Spieksma F. M.(undefined)) pollen in Europe: Trends and fluctuations in annual quantities and the starting dates of the seasons undefined undefined undefined-undefined
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Emberlin J.C.(undefined)undefined undefined undefined undefined-undefined
[6]
Hjelmros M.(undefined)undefined undefined undefined undefined-undefined
[7]
Jäger S.(undefined)undefined undefined undefined undefined-undefined
[8]
Leuschner R.(undefined)undefined undefined undefined undefined-undefined