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Figure 11
(a) Relationship between the various crystal forms obtained by reacting L- and DL-serine with oxalic acid; (b) note the strong resemblance between crystals of DL and L-serine oxalate hydrates.

IUCrJ
Volume 4| Part 4| July 2017| Pages 369-379
ISSN: 2052-2525
https://doi.org/10.1107/S2052252517005917