Methods of test for masonry units - Part 4: Determination of real and bulk density and of total and open porosity for natural stone masonry units; German version EN 772-4:1998— 6 стр.
Methods of test for masonry units - Part 11: Determination of water absorption of aggregate concrete, autoclaved aerated concrete, manufactured stone and natural stone masonry units due to capillary action and the initial rate of water absorption of clay masonry units (includes amendment A1:2004); German version EN 772-11:2000 + A1:2004— 8 стр.
