11115. Tunell, G. and Pauling, L.   The Atomic Arrangements and Bonds of the Gold-Silver Ditellurides.   , 1952, Acta Crystallographica, 5 : 375-381.   Printed wraps, signs of edge wear and age discoloration, text still in good condition.   Papers from the Geophysical Laboratory Carnegie Museum of Washington No. 1168, in English.   $25.00

11114. Graf, D. L. and Bradley, W. F.   The Crystal Structure of Hunite, Mg3Ca(Co3)4.   , 1962, Acta Crystallographica, 15 (2) : 238-242, 5 figures.   Off-print, very good condition.   Published in English.   $3.00

111700. Donnay, G. and Allman, R.   Si3O10 Groups in the Crystal Structure of Ardennite.   Acta Crystallographica, 1968, Acta Crystallographica, Volume B 24, Part 6 : pages 845-855 with 2 figures.   Softbound, minor signs of use, very good condition.    $5.00