@article {557,
	title = {Hirmeriella muensteri: new data on the fertile organs leading to a revised concept of the Cheirolepidiaceae},
	journal = {Review of Palaeobotany and Palynology},
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	year = {1991},
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	author = {Clement-Westerhof, Johanna A. and Konijnenburg-Van Cittert, Johanna H. A. van}
}
@article {548,
	title = {Comia and Rhachiphyllum from the Early Permian of Sumatra, Indonesia},
	journal = {Review of Palaeobotany and Palynology},
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	year = {2009},
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	author = {Booi, Menno and Waveren, Isabel M. van and Konijnenburg-Van Cittert, Johanna H. A. van}
}
@article {547,
	title = {New material of Macralethopteris from the Early Permian Jambi flora (Middle Sumatra, Indonesia) and its palaeoecological implications},
	journal = {Review of Palaeobotany and Palynology},
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	year = {2008},
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	author = {Booi, Menno and Waveren, Isabel M. van and Konijnenburg-Van Cittert, Johanna H. A. van and Boer, P.L. de}
}
