TY - CHAP A1 - Armstrong, W.A. T1 - The use of information about occupation Y1 - 1972 DO - 10.1017/CBO9780511896118.007 A3 - Wrigley, E.A. T2 - Nineteenth-century society: Essays in the use of quantitative methods for the study of social data CY - Cambridge PB - Cambridge University Press ER -