Johnson, Leander F.
Methods for reserch on the ecology of soil- borne plant pathogens / Textual Documents Leander F, Johnson and elroy A, Curl. - Minnesota : Burgess Publishing co , 1972. - vi,457p ; .
Soil conservation Methods for reserch on the ecology of soil- borne plant pathogensManual of fruit insects
631.46^ aJHO /
Methods for reserch on the ecology of soil- borne plant pathogens / Textual Documents Leander F, Johnson and elroy A, Curl. - Minnesota : Burgess Publishing co , 1972. - vi,457p ; .
Soil conservation Methods for reserch on the ecology of soil- borne plant pathogensManual of fruit insects
631.46^ aJHO /