1. Proc. Second Int. Symp. Chemistry of Cement;Sundius,1938
2. Proc. Third Int. Symp. Chemistry of Cement;Parker,1952
3. Proc. Fourth In. Symp. Chemistry of Cement;L'hopitallier,1960
4. Proc. Fifth Int. Symp. Chemistry of Cement;Robson,1968
5. Sixth Int. Congress Chemistry of Cement;Talaber,1974