TY  - BOOK
TI  - The manufacture of cement and sulphuric acid from calcium sulphate/ United Nations
PY  - 1971///
CY  - Nova York
PB  - United Nations
KW  - Cimento
KW  - Acido sulfurico
KW  - Sulfato de cálcio
N1  - Inv. 2016
ER  -