000
00249nam a22001097a 4500
003
OSt
100
_a
Herger
245
_a
Control of powdery mildew fungi with extracts of the gaint knot weed
700
_a
Klingauf
901
_a
RP1787
942
_2
ddc
_c
RP
999
_c
8597
_d
8597