TY  - BOOK
AU  - Bos, L
TI  - Symptoms of virus diseases in plants with indexes of names of symptoms in english, dutch, german, french, italian and sp
U1  - 632.8/BOS 
PY  - 1970///
CY  - Wageningen
PB  - Institute of Phytopathological Research
KW  - Virus diseases of plants
ER  -