000			00336nam a2200121Ia 4500
008			251112s9999||||xx |||||||||||||| ||und||
040			_aCNCLSA
245		0	_aProceeding of the national academy of sciences
260			_cSeptember 1, 1992 _bNational Academy Of Science _aU. S. A
300			_aP.7851-8858
300			_bV.89
942			_cJRBV
999			_c33495 _d33495