000 00299nam a2200121Ia 4500
008 251112s9999||||xx |||||||||||||| ||und||
040 _aCNCLSA
245 0 _aProceeding of the national academy of sciences
260 _cJanuary, 1987
_aU. S. A
300 _aP.1-900
300 _bV.84
942 _cJRBV
999 _c21424
_d21424