TY  - BOOK
AU  - Zawolek,M W.
AU  - Zadoks,J.C.
ED  - Landbouwhogeschool Wageningen.
TI  - A physical theory of focus development in plant disease
T2  - Wageningen Agricultural University papers
SN  - 9067541591
U1  - 632.3 
PY  - 1989///
CY  - Wageningen, Netherlands
PB  - Agricultural University Wageningen
KW  - Plant diseases
KW  - Epidemiology
KW  - Mathematical models
KW  - Statistical methods
N1  - Originally presented as the authors's thesis (Ph.D.) Wageningen Agricultural University?
ER  -