Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
The Farm Worker In A Changing Agriculture. Part I In A Series On Technological Change And Farm Labor Use, Kern County, California, 1961. Research Report No. 277.
Verfahren zur einschraenkung der schadwirkung von gaeumannomyces graminis var. tritici bei weizen mittels einer praeinokulation von avirulenten staemmen des erregers