000			00341nam a2200145Ia 4500
008			130223s9999 xx 000 0 und d
100			_aPazzi, J.J.O.
245			_aVertical circular silos
260			_aPretoria
260			_c1965
300			_a58 p.
440			_aNo. 379; South Africa Departme
901			_pS10549
942			_cB _2udc
999			_c136501 _d136501