00294nam a2200109 a 450000500170000000800410001704100080005810000220006624500520008826400360014030000080017620260717091723.0260717s1998    ii            000 0 eng d  aeng1 aTwyman, Richard M10aAdvanced Molecular Biology /cTwyman, Richard M 1aNew Delhi :bViva Books,c1998.  a499