1.The Economic Impact of Agricultural Extension: A Review
Dean Birkhaeuser, Robert E. Evenson and Gershon Feder Economic Development and Cultural Change, Vol. 39, No. 3 (Apr., 1991), pp. 607-650 (article consists of 44 pages) Published by: The University of Chicago Press Stable URL: http://www.jstor.org/stable/1154389

2.
Does Agricultural Extension Pay? The Training and Visit System in Northwest India
Gershon Feder, Lawrence J. Lau and Roger H. Slade American Journal of Agricultural Economics, Vol. 69, No. 3 (Aug., 1987), pp. 677-686
(article consists of 10 pages) Published by: Blackwell Publishing on behalf of the Agricultural & Applied Economics Association Stable URL: http://www.jstor.org/stable/1241702
3.
Agricultural Productivity and Sources of Growth in South Asia
Mark W. Rosegrant and Robert E. Evenson American Journal of Agricultural Economics, Vol. 74, No. 3 (Aug., 1992), pp. 757-761
(article consists of 5 pages) Published by: Blackwell Publishing on behalf of the Agricultural & Applied Economics Association Stable URL: http://www.jstor.org/stable/1242590
4.
Evaluating the Impact of Manufacturing Extension on Productivity Growth
Ronald S. Jarmin Journal of Policy Analysis and Management, Vol. 18, No. 1 (Winter, 1999), pp. 99-119
(article consists of 21 pages) Published by: John Wiley & Sons on behalf of Association for Public Policy Analysis and Management Stable URL: http://www.jstor.org/stable/3326074