Dunham, R., Andersen, R. Crop rotation and associated tillage practices for controlling annual weeds in flax and reducing the weed seed population of the soil. Minneapolis: 1958 20 p. : ill.
Dunham, R., Andersen, R. Crop rotation and associated tillage practices for controlling annual weeds in flax and reducing the weed seed population of the soil. Minneapolis: 1958 20 p. : ill.
Dunham, R., Andersen, R. (1958) Crop rotation and associated tillage practices for controlling annual weeds in flax and reducing the weed seed population of the soil, Minneapolis: 20 p. : ill.
Dunham, R., & Andersen, R. (1958). Crop rotation and associated tillage practices for controlling annual weeds in flax and reducing the weed seed population of the soil. Minneapolis: 20 p. : ill.
Dunham R, Andersen R. Crop rotation and associated tillage practices for controlling annual weeds in flax and reducing the weed seed population of the soil. Minneapolis: 1958. p. 20 p. : ill.