000 00233nam a2200097Ia 4500
100 _aFAO
245 _aFAO Soils Bulletin : Nos 11 15 17 & 18
260 _bFAO of the U S, Rome
082 _aN/B13286
300 _app 78 68 67 71; 27*21
999 _c17225
_d17225