3
3
John Hajnal, “Two Kinds of Pre-industrial Household Formation Sys tems”, Population and Development Review 8 (1992): 449–494; Wrigley and Schofield, Population History of England.
3
John Hajnal, “Two Kinds of Pre-industrial Household Formation Sys tems”, Population and Development Review 8 (1992): 449–494; Wrigley and Schofield, Population History of England.