1. Manufactured Abrasives, Old and New;Ridgway;Chem. Eng. News,1943
2. Physico-Chemical Principles of Grinding Materials;Eitel;Z. Ver. deut. Ing.,1928
3. Technisch hergestellte Korunde für Schleif-und Polierzwecke;Richards;Schleif- u. Poliertech.,1940
4. On Some High-Alumina Minerals in a Block of Electrocorundum;Filonenko;Compt. rend. acad. sci., U.R.S.S.,1945
5. X-Ray Studies on Magneto-plumbite, PbO.6Fe2O3, and Other Substances Resembling Beta-Alumina, Na2O. 11Al2O3;Adelsköld;Arkiv. Kemi, Mineral. Geol.,1938