ASTM specifications for concrete masonry units... 

 - Philadelphia, Pa. : American Society for Testing and Materials 
 - 37 p. 
<br/><br/> 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...