TY  - SER
AU  - Gratwick, M.,
TI  - Plant Pathology Vol. 28(1-4)
SN  - 0117226416
SN  - 0-11-7226
U1  - 571.92 
PY  - 1979///
CY  - London
PB  - Her Majestys Stationary Office
KW  - Plant Pathology
ER  -