The palynological study was extend in the fields of botany, forestry, geography and especially geology in the last ten years.
The exchange of interesting data of palynology among several countries is very active in the recent years.
The First International Conference on Palynology was held at Arizona University, U. S.A. in 1961 and The Second Conference will be held at Utrecht, Netherland in 1966.
Other symposia on palynology were held at Hawaii, Paris and many places.
This paper deals with informations about these symposia.
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