000 00303nam a22001217a 4500
003 OSt
008 240105b |||||||| |||| 00| 0 eng d
082 _aP505
_bP87
245 _aProceedings of the National Acad. Sc. U.S.A - Vol.78
260 _aWashington
_bNAS
_c1981
300 _a11-12
942 _2ddc
_cBK
999 _c35522
_d35522