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  1. Research report from the Michigan State University Agricultural Experiment Station, East Lansing
  2. Special bulletin - Michigan State College, Agricultural Experiment Station, Section of Forestry
  3. Bulletin of the Agricultural Experiment Station of the University of Tennessee, state agricultural and mechanical college
  4. Bulletin - Agricultural Experiment Station, North Carolina State University at Raleigh
  5. Technical bulletin - Michigan Agricultural Experiment Station (East Lansing)
  6. Research report - Agricultural Experiment Station, Utah State University
  7. Bulletin - University of Puerto Rico, Mayagüez Campus College of Agricultural Sciences, Agricultural Experiment Station
  8. Bulletin - University of Hawaii, Agricultural Experiment Station
  9. Bulletin - University of Nevada, Agricultural Experiment Station
  10. Bulletin - Agricultural Experiment Station, University of Minnesota