00313nam a2200097Ia 4500008004100000082002000041100005100061245007400112260002300186300000600209140113s9999    xx            000 0 und d  a628.53(047)  L2  a"Britain-Ministry of Agric., Fisheries & Food"  aRoyal commission on environmental pollution-second report-Comnd. 4894  a1972bHMSOcLondon  a9