Ortuno, A., Chacón, J., BonDurant, R., Noordhuizen, J., Perez, E., Conrad, P. A., & Hird, D. (1992). Prevalence and risk factors for Trichomonas foetus infection in cattle in northeastern Costa Rica.

Ortuno, Ana, Jorge Chacón, Robert BonDurant, Jos Noordhuizen, Enrique Perez, Patricia A. Conrad, و David Hird. Prevalence and Risk Factors for Trichomonas Foetus Infection in Cattle in Northeastern Costa Rica. 1992.

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