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 V 38:1967BS $50.80 Original price was: $50.80.$25.40Current price is: $25.40. Add to cart BS Z 100:1999BS $175.26 Original price was: $175.26.$87.63Current price is: $87.63. Add to cart BS Z 11:1998BS $195.58 Original price was: $195.58.$97.79Current price is: $97.79. Add to cart BS Z 17:2000BS $175.26 Original price was: $175.26.$87.63Current price is: $87.63. Add to cart