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E. Ladewig Petersen, “Eric Kerridge: Agrarian Problems in the Sixteenth Century and After. Historical Problems: Studies and Documents, ed. by G. R. Elton, vol. 6. London, Allen & Unwin, 1969. xii, 216 s. 35 sh. Paper 22 sh”., ht, bd. 12, jan. 1973.