00295nam a2200109Ia 450000500170000000800410001708200150005810000200007324500420009326000420013530000080017720260225050933.0260224s9999||||xx |||||||||||||| ||und||  a631.45 THO  aL. M. Thompson  0aSoils and soil fertility 3rd edition   aNew York: McGraw-Hill Book Co. c1973  a495