00315nam a2200109Ia 450000500170000000800410001708200140005810000170007224500630008926000450015230000080019720260225051120.0260224s9999||||xx |||||||||||||| ||und||  a631.4 WHI  aR. E. White  0aIntroduction to the priinciples & practice of soil sciene   aLondon: Balckwell Scientific Pub. c1987  a244