1。

• Effects of Farm Size on Economic Efficiency: The Case of PakistanMahmood H. Khan and Dennis R. Maki American Journal of Agricultural Economics
  Vol. 61, No. 1 (Feb., 1979), pp. 64-69
  (article consists of 6 pages)
• Published by: Oxford University Press on behalf of the Agricultural & Applied Economics Association
• Stable URL: http://www.jstor.org/stable/1239501

2。

• Efficiency and Equity in Natural Resource and Environmental PolicyRobert H. Haveman American Journal of Agricultural Economics
  Vol. 55, No. 5, Proceedings Issue (Dec., 1973), pp. 868-878
  (article consists of 11 pages)
• Published by: Oxford University Press on behalf of the Agricultural & Applied Economics Association
• Stable URL: http://www.jstor.org/stable/1238931