Excerpt from Physical Properties of Dense Concrete as Determined by the Relative Quantity of Cement
The University publishes bulletins six times a month, so numbered that the first two digits of the number show the year of issue, the last two the Это и многое другое вы найдете в книге Physical Properties of Dense Concrete as Determined by the Relative Quantity of Cement (Classic Reprint) (F. E. Giesecke)