Villalobos, W., Rivera, C., & Harnmond, R. W. (1997). Occurrence of citrus viroids in Costa Rica.
Čikaški stil citiranjaVillalobos, W., C. Rivera, i R W. Harnmond. Occurrence of Citrus Viroids in Costa Rica. 1997.
MLA način citiranjaVillalobos, W., C. Rivera, i R W. Harnmond. Occurrence of Citrus Viroids in Costa Rica. 1997.
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