UK, North Pomfret Vermont US, North Vancouver Canada Weber J, Mayr N, Bayer K, Hughes D, Kozłowski R, Stillhammerova M, Ullrich D, Vyskocilova R (2007) Roman cement mortars in Europe’s architectural heritage of the 19th century. Journal of the American Society for Testing Materials International, Vol, 4 No 8 Footnotes External links Parker's Roman Cement 1796 Building materials Cement