1. Polymorphism and Polytypism in Crystals;Verma,1966
2. Polytype Structures,1983
3. The structure of micas and related minerals, and the structure of chlorites;Pauling,1930
4. The structure of micas and related minerals, and the structure of chlorites;Pauling,1930
5. The structure of certain silicates;Bragg,1927