00298nam a2200097Ia 450000500170000000800410001705000170005810000170007524500700009226000380016220251229182347.0251229s9999    xx            000 0 und d  aTP  995 .N38  aNeal,  A .W. 0aFoemation and use of industrial by-productsba guide.c A .W Neal  aLondonb Business book Ltd.c1974