Cyril G. (Cyril George) Hopkins
Nitrogen Bacteria and Legumes With special reference to red clover, cowpeas, soy beans, alfalfa, and sweet clover, on Illinois soils
Cyril G. (Cyril George) Hopkins · 2018
ספרייה ציבורית, Project Gutenberg. בלי הרשמה.
Nitrogen-fixing microorganismsNitrifying bacteria