摘要
The index numbers show the relative level of the aggregate volume ofagricultural production for each year incomparison with the base poriod 1969-71.They are based on the sum of price-weighted quantities of different agricul-tural commodities produced after deduc-tions of quantities used as seed andfeed weighted in a similar manner. Theresulting aggregate represents. therefore,
出处
《统计》
1985年第2期44-45,共2页