000			00310nam a2200133Ia 4500
008			130223s9999 xx 000 0 und d
245			_aAvian embryo development
260			_aLondon
260			_c1972
300			_a24 p.
440			_aNo. 23; Great Britain Ministry
901			_pS21447
942			_cB _2udc
999			_c116407 _d116407