00522nam a2200205Ia 4500008004100000041001200041082001000053082001100063100001600074100001500090100001100105245008100116260001300197260001300210260000900223300001500232365002500247650002700272650001700299150909s9999    xx            000 0 und d  aEnglish  a631.4  bVEH/ME  aGillman G    aVehara G    eAuthor  aMineralogy chemistry and physics of tropical soils with variable change clys  aColorado  bWestview  c1981  a169  Pages  aRs.54                 aAgricultural chemistry  aSoil Science