00354nam a2200109Ia 4500008004100000040001100041100002400052245008400076260005700160300001700217300001000234251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  aBernard K. Forscher 0aProceedings of the National Academy Of Sciences of the United States of America  capril, 1979bThe National Academy of SciencesaU.S.A  aP. 1525-3040  bV. 76