000 00299nam a2200121Ia 4500
008 251112s9999||||xx |||||||||||||| ||und||
040 _aCNCLSA
245 0 _aScience
260 _cJuly 10, 1960
_bThe National Academy of Sciences
_aWashington
300 _aP. 1-414
300 _bV. 54
942 _cJRBV
999 _c20385
_d20385