000 00295nam a22001217a 4500
008 230502b |||||||| |||| 00| 0 eng d
020 _a0 7181 1994 0
040 _aNational Science Library
_cNational Science Library
100 _98076
245 _aNature
260 _c1961
942 _cCR
_2udc
999 _c64066
_d64066