TY  - BOOK
ED  - American Society for Testing and Materials (Estados Unidos)
TI  - ASTM specifications for concrete masonry units..
CY  - Philadelphia, Pa. : American Society for Testing and Materials
N1  - Contenido: Tentative specification for concrete building br-ick. -- Tentative specification for hollow load-bearing con-crete masonry units. -- Tentative specification for hollow -non-load-bearing concrete masonry units. --Standard specifi-cation for concrete masonry units for construction of catch- basins and manholes
ER  -