In Russian. Yurkin, Sergey Nikolaevich. Nitrogen, phosphorus, and potassium balance under conditions of intensification of agriculture. Moscow: VNIITEISH, 1975. Balans azota, fosfora i kaliya v usloviyakh intensifikatsii zemledeliya. In Russian /Nitrogen-phosphorus-potassium balance under intensification of agriculture. All images are for identification of editions only. Several books of the same edition may be available. Please feel free to request photos of available books. SKU6933961