Cement and how to use it : a working manual of up-to-date practice in the manufacture and testing of cement : the proportioning, mixing, and depositing of concrete, and its application to all forms of concrete construction, plain and reinforced : with special chapters on concreting tools and machinery, waterproofing, working rules, etc. (1910)
Radford, William A., 1865- · Chicago : Radford Architectural Co. · leaf 159
Cement · Concrete construction
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.