TY  - BOOK
AU  - Carlson, C. C.
TI  - Lightweight aggregates for concrete masonry units / by C. C-. Carlson
CY  - Skokie, Illinois : atories, Development Department
N1  - "Authorized reprint from copyrighted Journal of the America-n Concrete Institute November 1956, Proceedings Vol. 53. p.- 491."
ER  -