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Drought, harvest failure, and dearth during the pastoral age, 1828-1848
Raby, Geoff, (1983)
Gradobitnostta v Bŭlgarija : Bŭlg. Akad. na naukite. Centr. naučnoizsl. Inst. po rastenievŭdstvo
Nedjalkov, Nedjalko S., (1960)
Report by the Committee for Agriculture on the market outlook for cereals, animal feed and livestock products
(1976)
Agricultural financing in the Third Farm Credit District : credit in Florida
Love, Maxey D., (1989)