000			00338nam a2200145Ia 4500
008			180613s9999||||xx |||||||||||||| ||und||
020			_a9251005109
041			_aen
082			_a631.417
100			_aFLAIG, W.
245		0	_aOrganic materials and soil productivity
260			_aRome _bFAO _c1977
300			_aviii, 119p
942			_cSR
999			_c79448 _d79448