000 00293nam a2200121Ia 4500
003 LDD
040 _cLDD
041 _aen
245 0 _aScience
260 _aAmerican association for the advancement of science
_bWashington
_c1 Feb-28 Feb,1993
362 _a251-251
_b4993-4996
942 _2ddc
_cJ
999 _c190499
_d190499