Bibliography
- This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). Encyclopædia Britannica (11th ed.). Cambridge University Press., s.v. 'stone'
- George Ripley, ed., The American Cyclopædia: A Popular Dictionary of General Knowledge, 1873 s.v. 'concrete'
Read more about this topic: Artificial Stone