=LDR 00000nam a2200000ui 4500 =001 1672 =008 250530s2002\\\\xx\|||||||||||||||||eng\d =082 04$a631.4 ASH =100 1\$aAshman, M. R. =245 10$aEssential soil science: a clear and concise introducion to soil science =260 \\$aOxford :$bBlackwell Scientific,$c2002 =700 1\$aPuri, G. =852 \\$bFreeman Library$cBooks$h631.4 ASH