IRScNB_P4087_00E286P_36_Bulletin6.pdf
Bulletin of the Royal Belgian Institute of Natural Sciences 1949-1971 / 36 - 1960 White, E.I. 1960.
Notes on Pteraspids from Artois and the Ardenne.
irscnb_p4087_00e286p_36_bulletin-6-red.pdf
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