00302nam a2200097Ia 4500008004100000082002100041100005100062245006100113260002300174300000700197140113s9999    xx            000 0 und d  a631.2:728.94  L0  a"Britain-Ministry of Agric., Fisheries & Food"  aGlasshouse heating sytems (Mechanisation leaflet No. 27)  a1970bHMSOcLondon  a11