Elzaki Ali, R.M., Ibrahim Saied, M.A. and Mohamed Elsebaei, M.N. 2019. VEGETABLE PRODUCTION IN SAUDI ARABIA: PROTECTION COEFFICIENTS AND RELATIVE EFFICIENCY. Economics of Agriculture. 66, 2 (Jun. 2019), 457–469. DOI:https://doi.org/10.5937/ekoPolj1902457E.