Khurana, A SVenkataraman, G S2009-05-282009-05-281972-03-01Khurana AS, Venkataraman GS. Non-nitrogen fixing mutants of Azotobacter chroococcum. Indian Journal of Experimental Biology. 1972 Mar; 10(2): 136-9http://imsear.searo.who.int/handle/123456789/56664engAzotobacter --metabolismMutation --radiation effectsNitrogen Fixation --radiation effectsPigments, BiologicalRadiation EffectsUltraviolet RaysJournal Article