“…Swisher and Swisher (1977) 20-23 Edrissi and Kooshkabadi (1975) 28-35 Mudambi and Rajagopal (1977) and the Marsh Seedless the lowest contents of vitamin C in grapefruit grown in Israel. Metcalfe et al (1940) examined the Marsh, Marsh Pink, Redblush, Foster Pink, and Duncan grapefruit in Texas and concluded that there were only small differences in the vitamin C contents among these varieties.…”