000 00320nam a2200121Ia 4500
008 140113s9999 xx 000 0 und d
082 _a06.045:5/6(047) L2
100 _aNational Academy of Sciences
245 _aSceince Committee
260 _a1972
_bNational Academy of Science
_cU.S.A.
300 _a24
942 _cBK
999 _c57919
_d57919