00321nam a2200109Ia 450000500170000000800410001708200140005810000170007224500640008926000500015330000080020320260224040928.0260224s9999||||xx |||||||||||||| ||und||  a631.4 WHI  aWhite, R.E.  0aIntroduction to the principles and practice of soil science  aOxford: Blackwell Scientific Publishersc1987  a244