IRScNB_P4087_RBINS16934_18_Bulletin 42.pdf
Bulletin of the Royal Belgian Natural History Museum. 1930-1948 / 18 - 1942 Halle, T.G. 1942.
Some specimens of Potoniea from the Carboniferous (Westphalian) of Belgium.
irscnb_p4087_rbins16934_18_bulletin-42.pdf
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