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de Zulueta, J., J. P. Woodall, J. R. Cullen, M. C. Williams, G. W. Kafuko, و J. D. Gillett. An Observation On the Possible Effect of O'nyong-nyong Fever On Malaria. 1962.

de Zulueta, J., et al. An Observation On the Possible Effect of O'nyong-nyong Fever On Malaria. 1962.