1933. Allen, Ethel K. and O. N. Allen. Attempts to Demonstrate Symbiotic Nitrogen-Fixing Bacteria within the Tissues of Cassia tora. American Journal of Botany (2): 79-84. | Google Scholar |
1940. Allen, O. N. and Ethel K. Allen. Response of the Peanut Plant to Inoculation with Rhizobia, with Special Reference to Morphological Development of the Nodules. Botanical Gazette (1): 121-142. | Google Scholar |
1949. Harris, John O., Ethel K. Allen and O. N. Allen. Morphological Development of Nodules on Sesbania grandiflora Poir., with Reference to the Origin of Nodule Rootlets. American Journal of Botany (9): 651-661. | Google Scholar |
1953. Allen, Ethel K., O. N. Allen and A. S. Newman. Pseudonodulation of Leguminous Plants Induced by 2-Bromo-3,5- Dichlorobenzoic Acid. American Journal of Botany (6): 429-435. | Google Scholar |