00362nam a2200145Ia 450000500170000000800410001708200140005810000200007224500470009226000320013930000090017165000120018094200070019299900170019920240821151612.0240821s9999||||xx |||||||||||||| ||und||  a500.2 WOO  aWood, George C. 0aOur environment: How we use and control it  aBostonbAllyn & Baconc1952  a746p  aScience  cBK  c34504d34504