Click here to purchase Cross References:BS 4317-20 Product Details Published: 12/15/1999 ISBN(s): 0580330559 Number of Pages: 12 File Size: 1 file , 170 KB Product Code(s): 19978724, 19978724, 19978724 Post navigation Previous PostBS 4524:1983Next PostBS 5131-1.1:1991