BOERSMA, M., & BROEKMEYER, L. M., Irulex of Figured. Plant Megafossils; Triassic 1971-1975. - Special Publication of the Laboratory of Paleobotany and Palynology, Univ. Utrecht (The Netherlands ) , number 2, january 1980: 1-70 (del Instituut Systematische

RAFAEL HERBST

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