000			00346 a2200145 4500
080			_a631.483(213) _bS 989 P
245	1		_aSoil and tropical weathering _bProceedings
260			_aParis _bU.N.E.S.C.O. _c1971
300			_a150 p.
650			_aTropical Soil
650			_aWeathering
650			_aSoil Formation
100			_a _d
901			_a109957
999			_c44550 _d44550