00343nam a2200121Ia 4500008004100000022001400041040001100055100002100066245008400087260002700171300001400198300000900212251112s9999||||xx |||||||||||||| ||und||  a0027-8424  aCNCLSA  aLawrence Bogorad 0aProceedings of the National Academy Of Sciences of the United States of America  cJanuary 3, 1995aU.S.A  aP. 1-1246  bV.71