Production of fused portland cement and sulphic phosphorus-containing raw materials with added fluorine /
Gudovich, L. A.
Tenner, D. D.
Bryantzev, B. A.
Garston :  Building Research Station, 
1972.
Translated from Kompleks. issled. silikat. miner. syrʹya, 1970, 5-15 p.