Home BS BS 12:1991 BS 12:1991$68.58 Original price was: $68.58.$34.29Current price is: $34.29. Specification for Portland Cementstandard by BSI Group, 01/01/1991 BS 12:1991 quantity Add to cart Category: BS Description Product Details Published: 01/01/1991 Number of Pages: 20 Related products BS X 38:2005+A1:2015BS $142.24 Original price was: $142.24.$71.12Current price is: $71.12. Add to cart BS X 35:1998BS $50.80 Original price was: $50.80.$25.40Current price is: $25.40. Add to cart BS Z 2:1997BS $35.56 Original price was: $35.56.$17.78Current price is: $17.78. Add to cart BS W 13:1973BS $109.22 Original price was: $109.22.$54.61Current price is: $54.61. Add to cart