1. The internal purchasing power of the pound;OFFICE, C.E.N.T.R.A.L.S.T.A.T.I.S.T.I.C.A.L.;Statistical News; Updated figures in pamphlet on "Internal Purchasing Power of the Pound,1971
2. Figures for 1960-1970 in Economic Trends, No. 216;OFFICE, C.E.N.T.R.A.L.S.T.A.T.I.S.T.I.C.A.L.,1971
3. Smoking and carcinoma of the lung: preliminary report;DOLL, R.; HILL, A.B.;Brit. med. J,1950
4. The Price System;DORFMAN, R.,1964
5. CUSTOMS AND Exc[SE ANNUAL REPORTS;M, H.,1968