7,593 Nurul Jannah Abdullah 2019-01-07 https://www.agriculturejournals.cz/publicFiles/4_2008-HORTSCI.pdf Kristkova, E., Dolezalova, I., Lebeda, A., Vinter, V., & Novotna, A. (2008). Description of morphological characters of lettuce (Lactuca sativa L.) genetic resources. Horticultural Science, 35(3), 113-129.