FLENSBURG JOHN 605,200 Regulatory mechanirns causing overproductic duction of dihydrofolates reductase and resistance to antifclafes in Escherichia si coli : /doctoral dissertation/ / John Flensburg: Dhivarsity [ University of Uppsala], - Uppsala ; Department of Miocrobiology. Faculty of Pharamacy Univ., 1984. - 43 s. : il., wykr. ; 22 cm + wkł :/1/ k.