MILAN AND KONZAK: MUTATION INDUCTION EFFICIENCY 457 



ques Plantes Cultivees. In Chemische Mutagenese. Abhandl. 

 dtsch. Akad. Wiss., Akademie Verl. Berlin, 1: 106-108. 



20. , Ferrary, R., Levy, R., and Monard, Ch. 1961. Induction 



de Mutations Chez L'orge. Efficacite Relative Des Rayons, Du 

 Sullate D'Ethyle, Du Methane Sulfonate D'Ethyle et de Quel- 

 ques Autrex Substances. In Effects of Ionizing Radiations on 

 Seeds and Their Significance for Crop Improvement. Proc. Sci. 

 Symp. Sponsored by I.A.E.A. and F.A.O., Karlsruhe, Germany, 

 Aug. 8-12, 1960. 



21. Konzak, C. F. 1957. Genetic effects of radiation on higher plants. 



Quart. Rev. Biol., 32: 27-45. 



22. . Unpublished communication. 



23. , Curtis, H. }., Delihas, N., and Nilan, R. A. 1960. Modi- 

 fication of radiation-induced damage in barley seeds by thermal 

 energy. Can. Jour. Genet. Cytol., 2: 129-141. 



24. , Nilan, R. A., Legault, R. R., and Heiner, R. E. 1961. 



Modification of induced genetic damage in seeds. In Effects of 

 Ionizing Radiations on Seeds and Their Significance for Crop 

 Improvement. Proc. Sci. Symp. Sponsored by I.A.E.A. and F.A.O., 

 Karlsruhe, Germany, Aug. 8-12. 



25. Lewis, D. 1946. Useful X-ray mutations in plants. Nature, 158: 



519-520. 



26. Mericle, L. W. 1960. Irradiation of developing barley embryos at 



specific stages during ontogeny, its effects on subsequent develop- 

 ment and some potential applications of this method to a breed- 

 ing program. Barley Newsletter, 3: 21-22. 



27. , Sparrow, A. H., and Mericle, R. P. Unpublished com- 

 munication. 



28. Nilan, R. A. 1954. The relation of carbon dioxide, oxygen, and 



low temperature to the injury and cytogenetic effects of X-rays 

 in barley. Genetics, 39: 943-953. 



29. . 1956. Factors governing plant radio-sensitivity. U.S. 



A.E.C. Rpt. No. TID-7512. Proc. Conf. on Radioactive Isotopes 

 in Agriculture., U. S. Govt. Printing Office, 151-162. 



30. . 1960. Factors that govern the response of plant tissues to 



ionizing radiation. Genet. Agrar., 12: 283-296. 



31. . 1959. Radiation-induced mutation research in the United 



States of America. Proc. 2nd Eucarpia Congress, 36—17. 



32. , Konzak, C. F., Legault, R. R., and Harle, J. R. 1961. 



The oxygen effect in X-rayed barley seeds. In Effects of Ionizing 

 Radiations on Seeds and TJieir Significance for Crop Improve- 



