Mancy, A., Abdeen, S. (2017). 'EFFECT OF BLUE GREEN ALGAE AS A BIONITROGEN SOURCE ON YIELD, CHLOROPHYLL, SOME MACRO AND MICRONUTRIENTS CONTENT OF LETTUCE PLANT USING NUTRIENT FILM TECHNIQUE', Egyptian Journal of Agricultural Sciences, 68(4), pp. 343-350. doi: 10.21608/ejarc.2017.213708