En
RuRyazan Oblast
Ryazan Oblast
Past and present agronomic assistance in the Ryazan district, depending on the soil-climatic and living conditions of the province
Zakharov, Nikolai Sergeyevich. Past and present agronomic assistance in the Ryazan district, depending on the soil-climatic and living conditions of the region. Ryazan: Typography BV Tarasova, 1912.
1912
НБ Кремля
Materials to the plan of the national economy of Ryazan province. Issue. 7. Soil regions of the Ryazan province
Ryazan provincial planning commission. Materials to the plan of the national economy of Ryazan province. Ryazan: [Resistance]., 1926-1929.
Вып. 7: Soil regions of the Ryazan province. 1929.
Вып. 7: Soil regions of the Ryazan province. 1929.
1929