TY  - RPRT
TI  - A severe and a mild potato spindle tuber viroid isolate differ in three nucleotide exchanges only.
AU  - H J Gross
AU  - U Liebl
AU  - H Alberty
AU  - G Krupp
AU  - H Domdey
AU  - K Ramm
AU  - H L Sänger
PY  - 1981
DO  - 10.1007/bf01114910
UR  - https://pubmed.ncbi.nlm.nih.gov/6271277/
ID  - 6271277
ER  -