00324nam a2200109 a 450000500170000002000150001708200160003210000270004824500770007526000400015230000220019220251203110446.0  a0632048859  a631.4ASHb_  aAshman, M.R and Puri,G  aEssential Soil SciencebA Clear and Concise Introduction to Soil Science  aGermanybBlackwell Publishingc2000  avi,198p.c22cm HB