TY  - BOOK
AU  - Eckel,Edwin C.
AU  - Burchard,Ernest F.
TI  - Portland cement materials and industry in the United States,
T2  - U.S. Geological survey. Bulletin 522
AV  - QE75 .B9 no. 522
PY  - 1913///
CY  - Washington
PB  - Govt. print off.
KW  - Portland cement
N1  - Contains bibliographies
ER  -