000 00324nam a2200121Ia 4500
008 251112s9999||||xx |||||||||||||| ||und||
040 _aCNCLSA
245 0 _aProceedings Of The National Academy Of Sciences Of The United States Of America
260 _cApril 1984
300 _aP.2275-3606
300 _bV.81
942 _cJRBV
999 _c24171
_d24171