004100000a22001570004500060000800000082001400008100002100022100002500043100001700068245003100085250000600116260004600122260000900168300000800177650006700185  a100  a519.5 CRO  aCowden, Dudley J  aCroxton, Frederick E  aKlein Sidney  aApplied general statistics  a3  aNewdelhi, Prentice- Hall of India Pvt Ltd  c1967  a754  aStatistical data/ statistical tables/rates, ratios-percentages