Void spacing as a basis for producing air-entrained concret-e / by T. C. Powers.
Powers, T. C.
Void spacing as a basis for producing air-entrained concret-e / by T. C. Powers. - Chicago : atories - [24] p. - Bulletin 49 / Portland Cement Association .
Void spacing as a basis for producing air-entrained concret-e / by T. C. Powers. - Chicago : atories - [24] p. - Bulletin 49 / Portland Cement Association .