Citation: Maslen, E. N.; Streltsov, V. A.; Streltsova, N. R.; Ishizawa, N. (1995). Electron density and optical anisotropy in rhombohedral carbonates. III. Synchrotron X-ray studies of CaCO~3~, MgCO~3~ and MnCO~3~. Acta Crystallographica Section B, 51, pp. 929-939.