Five-hour test for determining the standard compressive strength of cement after 28 days. Prüfverfahren zur Vorausbestimmung der 28-Tage-Zement-Normendruckfestigkeit in 5 Stunden. (Translated from) Zement-Kalt-Gips, 1965, 18, 11, 574-9. [Illustrated.]
Meyer, A.,Writer on Cement.
Garston, 
1967.
[With a bibliography.]
Duplicated.