00405nam a2200157Ia 4500008004100000020001500041082001400056100001800070245002600088260004800114300000800162650001800170650001800188653001700206653002400223170901s1981    xx            000 0 und d  a0521280257  a575bG96B  aGutfreund, H. 0aBiochemical Evolution  aCambridgebCambridge University Pressc1981  a368  aLife sciences  aPure Sciences  aBiochemistry  aMolecular evolution