00256nam a22001097a 4500003000400000008004100004082001700045100002400062245001300086260003900099300000800138OSt231226b        |||||||| |||| 00| 0 eng d  aR575.1bS24G  aScientific American  aGenetics  aSan FransiscoWW. H. Freemanc1981  a331