Acta Cryst. (2000). B56, 166 [ doi:10.1107/S0108768199015967 ]
Abstract: Owing to a serious printing error, this article [Grell et al. (1999). Acta Cryst. B55, 1030-1043] was printed incorrectly. Pages 1029-1044 have thus been reprinted and included as a loose insert with this issue of the journal.
Keywords: Graph-set analysis; Hydrogen-bond patterns; Mathematical concepts.
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