TY - RPRT TI - Interrelations between cement and concrete properties, part 3 : compressive strengths of Portland cement test mortars and steam-cured mortars AU - Blaine, R L AU - Arni, H T AU - DeFore, M R PY - 1968 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS BSS 8 DO - 10.6028/NBS.BSS.8 ER -