MENDOZA-TAFOLLA, R. O., JUAREZ-LOPEZ, P., ONTIVEROS-CAPURATA, R.-E., SANDOVAL-VILLA, M., ALIA-TEJACAL, I. and ALEJO-SANTIAGO, G. (2019) “Estimating Nitrogen and Chlorophyll Status of Romaine Lettuce Using SPAD and at LEAF Readings”, Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 47(3), pp. 751-756. doi: 10.15835/nbha47311525.