Zaman, Q.- uz-., Hamid, F., Islam, S.- ul-., Ahmad, F. and Ahmad, N. (2018) “Impact of Various Levels of Nitrogen and Phosphorus on Growth and Yield of Spinach (Spinacea oleracea L.) under Conditions of Mansehra (Pakistan)”, Open Academic Journal of Advanced Science and Technology, 2(1), pp. 5–8. doi: 10.33094/5.2017.2018.21.5.8.