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These terms define your current search. Click the × to remove a term. Taxa - Viruses and Viroids: DNA and RNA reverse transcribing viruses > Retroviridae > Alpharetrovirus × 11 items, grouped by Farms and Farming Systems (view ungrouped items) farms (1)    (Click to View) Detection of avian leukosis virus subgroups in albumen of commercial and native fowl eggs using RT-PCR in Iran Tropical plant biology