1. Contributions of studies on the ,B-galactosidase of Escherichia coli to our understanding of enzyme synthesis;COHN M.;Bacteriol. Revs.,1957
2. GALE E. F. AND DAVIES R. 1953 Adaptation in microorganisms. Cambridge Univ. Press Cambridge England.
3. Replica plating and indirect selection of bacterial mutants;LEDERBERG J.;J. Bacteriol.,1952
4. SIJDERIUS R. 1946 Heterotrophebacterien die thiosulfat oxydeeron. Thesis University of Amsterdam Amersterdam Netherlands.
5. STANIER R. Y. 1954 The plasticity of enzymatic patterns in microbial cells. In Aspects of synthesis and order in growth pp. 43-67. Edited by D. Rudnick. Princeton Univ. Press Princeton N. J.