TY  - RPRT
TI  - A scheme for viroid classification.
AU  - A M Koltunow
AU  - M A Rezaian
PY  - 1989
DO  - 10.1159/000150093
UR  - https://pubmed.ncbi.nlm.nih.gov/2777536/
ID  - 2777536
ER  -