@book{33246,
	author = {Nutman, P. S.},
	title = {The influence of physical environmental factors on the activity of Rhizobium in soil and in symbiosis},
	note = {Sobretiro de : Organismo Internacional de Energía Atómica. Use of isotopes for study of fertilizer utilization by Legume Crops. Vienna : The Agency, 1972, 55-84.}
}