%0 Journal Article %T Evidence for a Clonal Origin of Relative Penicillin Resistance among Type 9L Pneumococci in Northwestern Canada %A Waltman II, W. Douglas %A Talkington, Deborah F. %A Lipinski, A. E. %A Crain, Marilyn J. %A Dixon, J. M. S. %A Briles, David E. %J The Journal of Infectious Diseases %V 165 %N 4 %P 671-675 %@ 0022-1899 %D 1992-04-01 %I Oxford University Press %~ DeepDyve