Helgeson, E. A. (1957). Methods of weed control. Rome: Food and Agriculture Organization of the United Nations (FAO).
Chicago Style CitationHelgeson, Earl A. Methods of Weed Control. Rome: Food and Agriculture Organization of the United Nations (FAO), 1957.
MLA CitationHelgeson, Earl A. Methods of Weed Control. Rome: Food and Agriculture Organization of the United Nations (FAO), 1957.
Warning: These citations may not always be 100% accurate.