00310nam a2200097Ia 4500008004100000040001100041245008400052260004900136300001700185300001000202251112s9999||||xx |||||||||||||| ||und||  aCNCLSA 0aProceedings of the National Academy Of Sciences of the United States of America  cApril 1, 1993bProc. Natl. Acad. Sci.aU.S.A  aP. 2557-3775  bV. 90