Ulrich, A., & Hills, F. J. (1900). Sugar beet nutrient deficiency symptoms: A color atlas and chemical guide. University of California.
Chicago Style (17. basım) AtıfUlrich, Albert, ve F. Jackson Hills. Sugar Beet Nutrient Deficiency Symptoms: A Color Atlas and Chemical Guide. Berkeley: University of California, 1900.
MLA (9th ed.) AtıfUlrich, Albert, ve F. Jackson Hills. Sugar Beet Nutrient Deficiency Symptoms: A Color Atlas and Chemical Guide. University of California, 1900.
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