Crystal Symmetry
London: Printed by Order of the Trustees of The British Museum, 1939. 1st Edition. Soft cover. 5" x 8.5" British Museum (Natural History). Orig. green wrappers, saddle stitched. 20 pp., II plates, B&W figures. Covers darkened to edges, some light bumping and creasing, small nick to head of front cover..... More