@article{ author = {Mohammadi Gheisar, M., Foroudi, F., Ghazikhani Shad, A.}, title = {Effect of Using L–Threonine and Reducing Dietary Levels of Crude Protein on Egg Production in Layers}, journal = {Iranian Journal of Applied Animal Science}, year = {2011}, volume = {1}, number = {1}, pages = {65-68}, doi = {} }