Hamedani Mojarad P, Sabouri MS, Charmchian Langerodi M, Dinpanah R. The Design of a Contract Farming (CF) Model to Improve the Poultry Industry Value Chain in Tehran Province; Iran (Grounded Theory Approach). MSES. Published online April 1, 2027:1-13. Accessed October 7, 2026. https://msesj.com/index.php/mses/article/view/437