000 00242nam a2200109Ia 4500
082 _a630.7
_bFOS
245 _aThe soil
_b; conserving the soil, improving the soil
260 _aRome:
_bFAO,
_c1972.
300 _a30p
546 _aeng
942 _cBK
999 _c7759
_d7759