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Tradicii krestʹjanskogo zemlepolʹzovanija v Pomorʹe i Zapadnoj Sibiri : v 17 - 18 vv.
Vlasova, Irina Vladimirovna, (1984)
Agricultural diversification and the decline of wheat : a comparative study of East Anglia, California and Central Victoria, 1850 - 1910
Frost, Warwick, (1994)
The occupational structure of plantation slave labor in the late antebellum era
Olson, John F., (1984)